diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
index 8ac1ca177..47dbbb2a4 100644
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -1,5 +1,8 @@
 blank_issues_enabled: false
 contact_links:
+    - name: Issue about the Chatterino Browser Extension
+      url: https://github.com/Chatterino/chatterino-browser-ext/issues
+      about: Make a suggestion or report a bug about the Chatterino browser extension.
     - name: Suggestions or feature request
       url: https://github.com/chatterino/chatterino2/discussions/categories/ideas
       about: Got something you think should change or be added? Search for or start a new discussion!
diff --git a/.github/ISSUE_TEMPLATE/z_browser_extension.md b/.github/ISSUE_TEMPLATE/z_browser_extension.md
deleted file mode 100644
index 2ae9cdf67..000000000
--- a/.github/ISSUE_TEMPLATE/z_browser_extension.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-name: Issue about the Chatterino Browser Extension
-about: Make a suggestion or report a bug about the Chatterino browser extension.
-
----
-
-Issues for the extension are tracked here: https://github.com/chatterino/chatterino-browser-ext
diff --git a/.github/workflows/changelog-check.yml b/.github/workflows/changelog-check.yml
index 7fbceea74..05a2454e8 100644
--- a/.github/workflows/changelog-check.yml
+++ b/.github/workflows/changelog-check.yml
@@ -13,7 +13,7 @@ jobs:
 
       # Gives an error if there's no change in the changelog (except using label)
       - name: Changelog check
-        uses: dangoslen/changelog-enforcer@v2.2.0
+        uses: dangoslen/changelog-enforcer@v2.3.1
         with:
           changeLogPath: 'CHANGELOG.md'
           skipLabels: 'no changelog entry needed, ci, submodules'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d76c5724b..6099ca66c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,10 +10,14 @@
 - Minor: Added a setting to hide similar messages by any user. (#2716)
 - Minor: Duplicate spaces now count towards the display message length. (#3002)
 - Minor: Commands are now backed up. (#3168)
+- Minor: Added the ability to open an entire tab as a popup. (#3082)
+- Minor: Added optional parameter to /usercard command for opening a usercard in a different channel context. (#3172)
+- Bugfix: Fixed colored usernames sometimes not working. (#3170)
 - Bugfix: Restored ability to send duplicate `/me` messages. (#3166)
 - Bugfix: Notifications for moderators about other moderators deleting messages can now be disabled. (#3121)
 - Bugfix: Moderation mode and active filters are now preserved when opening a split as a popup. (#3113, #3130)
 - Bugfix: Fixed a bug that caused all badge highlights to use the same color. (#3132, #3134)
+- Bugfix: Allow starting Streamlink from Chatterino when running as a Flatpak. (#3178)
 - Dev: Renamed CMake's build option `USE_SYSTEM_QT5KEYCHAIN` to `USE_SYSTEM_QTKEYCHAIN`. (#3103)
 - Dev: Add benchmarks that can be compiled with the `BUILD_BENCHMARKS` CMake flag. Off by default. (#3038)
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7135e908b..094d60bb4 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -215,3 +215,28 @@ Keep the element on the stack if possible. If you need a pointer or have complex
 - Use the [object tree](https://doc.qt.io/qt-5/objecttrees.html#) to manage lifetimes where possible. Objects are destroyed when their parent object is destroyed.
 - If you have to explicitly delete an object use `variable->deleteLater()` instead of `delete variable`. This ensures that it will be deleted on the correct thread.
 - If an object doesn't have a parent, consider using `std::unique_ptr<Type, DeleteLater>` with `DeleteLater` from "src/common/Common.hpp". This will call `deleteLater()` on the pointer once it goes out of scope, or the object is destroyed.
+
+## Conventions
+
+#### Usage strings
+
+When informing the user about how a command is supposed to be used, we aim to follow [this standard](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap12.html) where possible.
+
+- Square brackets are reserved for `[optional arguments]`.
+- Angle brackets are reserved for `<required arguments>`.
+- The word _Usage_ should be capitalized and must be followed by a colon.
+- If the usage deserves a description, put a dot after all parameters and explain it briefly.
+
+##### Good
+
+- `Usage: /block <user>`
+- `Usage: /unblock <user>. Unblocks a user.`
+- `Usage: /streamlink <channel>`
+- `Usage: /usercard <user> [channel]`
+
+##### Bad
+
+- `Usage /streamlink <channel>` - Missing colon after _Usage_.
+- `usage: /streamlink <channel>` - _Usage_ must be capitalized.
+- `Usage: /streamlink channel` - The required argument `channel` must be wrapped in angle brackets.
+- `Usage: /streamlink <channel>.` - Don't put a dot after usage if it's not followed by a description.
diff --git a/lib/lrucache/lrucache/lrucache.hpp b/lib/lrucache/lrucache/lrucache.hpp
index aa2c6c511..ef7d031db 100644
--- a/lib/lrucache/lrucache/lrucache.hpp
+++ b/lib/lrucache/lrucache/lrucache.hpp
@@ -35,6 +35,7 @@ public:
     lru_cache(lru_cache<key_t, value_t> &&other)
         : _cache_items_list(std::move(other._cache_items_list))
         , _cache_items_map(std::move(other._cache_items_map))
+        , _max_size(other._max_size)
     {
         other._cache_items_list.clear();
         other._cache_items_map.clear();
@@ -44,6 +45,7 @@ public:
     {
         _cache_items_list = std::move(other._cache_items_list);
         _cache_items_map = std::move(other._cache_items_map);
+        _max_size = other._max_size;
         other._cache_items_list.clear();
         other._cache_items_map.clear();
         return *this;
diff --git a/src/common/ChannelChatters.cpp b/src/common/ChannelChatters.cpp
index 8b72f7b17..f9eb1ea65 100644
--- a/src/common/ChannelChatters.cpp
+++ b/src/common/ChannelChatters.cpp
@@ -74,6 +74,12 @@ void ChannelChatters::updateOnlineChatters(
     chatters_->updateOnlineChatters(chatters);
 }
 
+size_t ChannelChatters::colorsSize() const
+{
+    auto size = this->chatterColors_.access()->size();
+    return size;
+}
+
 const QColor ChannelChatters::getUserColor(const QString &user)
 {
     const auto chatterColors = this->chatterColors_.access();
diff --git a/src/common/ChannelChatters.hpp b/src/common/ChannelChatters.hpp
index 3a2c4e49a..70ca53924 100644
--- a/src/common/ChannelChatters.hpp
+++ b/src/common/ChannelChatters.hpp
@@ -25,9 +25,13 @@ public:
     void setUserColor(const QString &user, const QColor &color);
     void updateOnlineChatters(const std::unordered_set<QString> &chatters);
 
-private:
+    // colorsSize returns the amount of colors stored in `chatterColors_`
+    // NOTE: This function is only meant to be used in tests and benchmarks
+    size_t colorsSize() const;
+
     static constexpr int maxChatterColorCount = 5000;
 
+private:
     Channel &channel_;
 
     // maps 2 char prefix to set of names
diff --git a/src/common/Version.cpp b/src/common/Version.cpp
index aa8639dce..b678fe48a 100644
--- a/src/common/Version.cpp
+++ b/src/common/Version.cpp
@@ -2,6 +2,8 @@
 
 #include "common/Modes.hpp"
 
+#include <QFileInfo>
+
 #define UGLYMACROHACK1(s) #s
 #define FROM_EXTERNAL_DEFINE(s) UGLYMACROHACK1(s)
 
@@ -71,4 +73,9 @@ const bool &Version::isSupportedOS() const
     return this->isSupportedOS_;
 }
 
+bool Version::isFlatpak() const
+{
+    return QFileInfo::exists("/.flatpak-info");
+}
+
 }  // namespace chatterino
diff --git a/src/common/Version.hpp b/src/common/Version.hpp
index 1a858c0ea..967363358 100644
--- a/src/common/Version.hpp
+++ b/src/common/Version.hpp
@@ -29,6 +29,7 @@ public:
     const QString &dateOfBuild() const;
     const QString &fullVersion() const;
     const bool &isSupportedOS() const;
+    bool isFlatpak() const;
 
 private:
     Version();
diff --git a/src/common/WindowDescriptors.cpp b/src/common/WindowDescriptors.cpp
index 7a82596f3..902de665f 100644
--- a/src/common/WindowDescriptors.cpp
+++ b/src/common/WindowDescriptors.cpp
@@ -110,6 +110,42 @@ void SplitDescriptor::loadFromJSON(SplitDescriptor &descriptor,
     descriptor.filters_ = loadFilters(root.value("filters"));
 }
 
+TabDescriptor TabDescriptor::loadFromJSON(const QJsonObject &tabObj)
+{
+    TabDescriptor tab;
+    // Load tab custom title
+    QJsonValue titleVal = tabObj.value("title");
+    if (titleVal.isString())
+    {
+        tab.customTitle_ = titleVal.toString();
+    }
+
+    // Load tab selected state
+    tab.selected_ = tabObj.value("selected").toBool(false);
+
+    // Load tab "highlightsEnabled" state
+    tab.highlightsEnabled_ = tabObj.value("highlightsEnabled").toBool(true);
+
+    QJsonObject splitRoot = tabObj.value("splits2").toObject();
+
+    // Load tab splits
+    if (!splitRoot.isEmpty())
+    {
+        // root type
+        auto nodeType = splitRoot.value("type").toString();
+        if (nodeType == "split")
+        {
+            tab.rootNode_ = loadNodes<SplitNodeDescriptor>(splitRoot);
+        }
+        else if (nodeType == "horizontal" || nodeType == "vertical")
+        {
+            tab.rootNode_ = loadNodes<ContainerNodeDescriptor>(splitRoot);
+        }
+    }
+
+    return tab;
+}
+
 WindowLayout WindowLayout::loadFromFile(const QString &path)
 {
     WindowLayout layout;
@@ -117,15 +153,15 @@ WindowLayout WindowLayout::loadFromFile(const QString &path)
     bool hasSetAMainWindow = false;
 
     // "deserialize"
-    for (const QJsonValue &window_val : loadWindowArray(path))
+    for (const QJsonValue &windowVal : loadWindowArray(path))
     {
-        QJsonObject window_obj = window_val.toObject();
+        QJsonObject windowObj = windowVal.toObject();
 
         WindowDescriptor window;
 
         // Load window type
-        QString type_val = window_obj.value("type").toString();
-        auto type = type_val == "main" ? WindowType::Main : WindowType::Popup;
+        QString typeVal = windowObj.value("type").toString();
+        auto type = typeVal == "main" ? WindowType::Main : WindowType::Popup;
 
         if (type == WindowType::Main)
         {
@@ -142,21 +178,21 @@ WindowLayout WindowLayout::loadFromFile(const QString &path)
         window.type_ = type;
 
         // Load window state
-        if (window_obj.value("state") == "minimized")
+        if (windowObj.value("state") == "minimized")
         {
             window.state_ = WindowDescriptor::State::Minimized;
         }
-        else if (window_obj.value("state") == "maximized")
+        else if (windowObj.value("state") == "maximized")
         {
             window.state_ = WindowDescriptor::State::Maximized;
         }
 
         // Load window geometry
         {
-            int x = window_obj.value("x").toInt(-1);
-            int y = window_obj.value("y").toInt(-1);
-            int width = window_obj.value("width").toInt(-1);
-            int height = window_obj.value("height").toInt(-1);
+            int x = windowObj.value("x").toInt(-1);
+            int y = windowObj.value("y").toInt(-1);
+            int width = windowObj.value("width").toInt(-1);
+            int height = windowObj.value("height").toInt(-1);
 
             window.geometry_ = QRect(x, y, width, height);
         }
@@ -164,23 +200,10 @@ WindowLayout WindowLayout::loadFromFile(const QString &path)
         bool hasSetASelectedTab = false;
 
         // Load window tabs
-        QJsonArray tabs = window_obj.value("tabs").toArray();
-        for (QJsonValue tab_val : tabs)
+        QJsonArray tabs = windowObj.value("tabs").toArray();
+        for (QJsonValue tabVal : tabs)
         {
-            TabDescriptor tab;
-
-            QJsonObject tab_obj = tab_val.toObject();
-
-            // Load tab custom title
-            QJsonValue title_val = tab_obj.value("title");
-            if (title_val.isString())
-            {
-                tab.customTitle_ = title_val.toString();
-            }
-
-            // Load tab selected state
-            tab.selected_ = tab_obj.value("selected").toBool(false);
-
+            TabDescriptor tab = TabDescriptor::loadFromJSON(tabVal.toObject());
             if (tab.selected_)
             {
                 if (hasSetASelectedTab)
@@ -192,34 +215,11 @@ WindowLayout WindowLayout::loadFromFile(const QString &path)
                 }
                 hasSetASelectedTab = true;
             }
-
-            // Load tab "highlightsEnabled" state
-            tab.highlightsEnabled_ =
-                tab_obj.value("highlightsEnabled").toBool(true);
-
-            QJsonObject splitRoot = tab_obj.value("splits2").toObject();
-
-            // Load tab splits
-            if (!splitRoot.isEmpty())
-            {
-                // root type
-                auto nodeType = splitRoot.value("type").toString();
-                if (nodeType == "split")
-                {
-                    tab.rootNode_ = loadNodes<SplitNodeDescriptor>(splitRoot);
-                }
-                else if (nodeType == "horizontal" || nodeType == "vertical")
-                {
-                    tab.rootNode_ =
-                        loadNodes<ContainerNodeDescriptor>(splitRoot);
-                }
-            }
-
             window.tabs_.emplace_back(std::move(tab));
         }
 
         // Load emote popup position
-        QJsonObject emote_popup_obj = window_obj.value("emotePopup").toObject();
+        QJsonObject emote_popup_obj = windowObj.value("emotePopup").toObject();
         layout.emotePopupPos_ = QPoint(emote_popup_obj.value("x").toInt(),
                                        emote_popup_obj.value("y").toInt());
 
diff --git a/src/common/WindowDescriptors.hpp b/src/common/WindowDescriptors.hpp
index 9c2aa2888..4740bc919 100644
--- a/src/common/WindowDescriptors.hpp
+++ b/src/common/WindowDescriptors.hpp
@@ -67,6 +67,8 @@ struct ContainerNodeDescriptor {
 };
 
 struct TabDescriptor {
+    static TabDescriptor loadFromJSON(const QJsonObject &root);
+
     QString customTitle_;
     bool selected_{false};
     bool highlightsEnabled_{true};
diff --git a/src/controllers/commands/CommandController.cpp b/src/controllers/commands/CommandController.cpp
index 13368917e..82beac036 100644
--- a/src/controllers/commands/CommandController.cpp
+++ b/src/controllers/commands/CommandController.cpp
@@ -296,7 +296,7 @@ void CommandController::initialize(Settings &, Paths &paths)
     auto blockLambda = [](const auto &words, auto channel) {
         if (words.size() < 2)
         {
-            channel->addMessage(makeSystemMessage("Usage: /block [user]"));
+            channel->addMessage(makeSystemMessage("Usage: /block <user>"));
             return "";
         }
 
@@ -341,7 +341,7 @@ void CommandController::initialize(Settings &, Paths &paths)
     auto unblockLambda = [](const auto &words, auto channel) {
         if (words.size() < 2)
         {
-            channel->addMessage(makeSystemMessage("Usage: /unblock [user]"));
+            channel->addMessage(makeSystemMessage("Usage: /unblock <user>"));
             return "";
         }
 
@@ -455,7 +455,7 @@ void CommandController::initialize(Settings &, Paths &paths)
         if (words.size() < 2)
         {
             channel->addMessage(
-                makeSystemMessage("Usage /user [user] (channel)"));
+                makeSystemMessage("Usage: /user <user> [channel]"));
             return "";
         }
         QString userName = words[1];
@@ -476,12 +476,33 @@ void CommandController::initialize(Settings &, Paths &paths)
     this->registerCommand("/usercard", [](const auto &words, auto channel) {
         if (words.size() < 2)
         {
-            channel->addMessage(makeSystemMessage("Usage /usercard [user]"));
+            channel->addMessage(
+                makeSystemMessage("Usage: /usercard <user> [channel]"));
             return "";
         }
 
         QString userName = words[1];
         stripUserName(userName);
+
+        if (words.size() > 2)
+        {
+            QString channelName = words[2];
+            stripChannelName(channelName);
+
+            ChannelPtr channelTemp =
+                getApp()->twitch2->getChannelOrEmpty(channelName);
+
+            if (channelTemp->isEmpty())
+            {
+                channel->addMessage(makeSystemMessage(
+                    "A usercard can only be displayed for a channel that is "
+                    "currently opened in Chatterino."));
+                return "";
+            }
+
+            channel = channelTemp;
+        }
+
         auto *userPopup = new UserInfoPopup(
             getSettings()->autoCloseUserPopup,
             static_cast<QWidget *>(&(getApp()->windows->getMainWindow())));
@@ -604,7 +625,7 @@ void CommandController::initialize(Settings &, Paths &paths)
                 (!channel->isTwitchChannel() || channel->isEmpty()))
             {
                 channel->addMessage(makeSystemMessage(
-                    "Usage: /streamlink [channel]. You can also use the "
+                    "Usage: /streamlink <channel>. You can also use the "
                     "command without arguments in any Twitch channel to open "
                     "it in streamlink."));
                 return "";
@@ -625,7 +646,7 @@ void CommandController::initialize(Settings &, Paths &paths)
                 (!channel->isTwitchChannel() || channel->isEmpty()))
             {
                 channel->addMessage(makeSystemMessage(
-                    "Usage: /popout [channel]. You can also use the command "
+                    "Usage: /popout <channel>. You can also use the command "
                     "without arguments in any Twitch channel to open its "
                     "popout chat."));
                 return "";
@@ -652,7 +673,7 @@ void CommandController::initialize(Settings &, Paths &paths)
         if (words.size() < 2)
         {
             channel->addMessage(
-                makeSystemMessage("Usage: /settitle <stream title>."));
+                makeSystemMessage("Usage: /settitle <stream title>"));
             return "";
         }
         if (auto twitchChannel = dynamic_cast<TwitchChannel *>(channel.get()))
@@ -683,7 +704,7 @@ void CommandController::initialize(Settings &, Paths &paths)
         if (words.size() < 2)
         {
             channel->addMessage(
-                makeSystemMessage("Usage: /setgame <stream game>."));
+                makeSystemMessage("Usage: /setgame <stream game>"));
             return "";
         }
         if (auto twitchChannel = dynamic_cast<TwitchChannel *>(channel.get()))
@@ -748,7 +769,7 @@ void CommandController::initialize(Settings &, Paths &paths)
                                          const ChannelPtr channel) {
         if (words.size() < 2)
         {
-            channel->addMessage(makeSystemMessage("Usage: /openurl <URL>."));
+            channel->addMessage(makeSystemMessage("Usage: /openurl <URL>"));
             return "";
         }
 
diff --git a/src/providers/twitch/IrcMessageHandler.cpp b/src/providers/twitch/IrcMessageHandler.cpp
index a4ce3c513..e15362a5e 100644
--- a/src/providers/twitch/IrcMessageHandler.cpp
+++ b/src/providers/twitch/IrcMessageHandler.cpp
@@ -810,8 +810,7 @@ void IrcMessageHandler::handleNoticeMessage(Communi::IrcNoticeMessage *message)
         if (tags == "bad_delete_message_error" || tags == "usage_delete")
         {
             channel->addMessage(makeSystemMessage(
-                "Usage: \"/delete <msg-id>\" - can't take more "
-                "than one argument"));
+                "Usage: /delete <msg-id>. Can't take more than one argument"));
         }
         else if (tags == "host_on" || tags == "host_target_went_offline")
         {
diff --git a/src/singletons/Updates.cpp b/src/singletons/Updates.cpp
index 5751b59cc..cf32b30ff 100644
--- a/src/singletons/Updates.cpp
+++ b/src/singletons/Updates.cpp
@@ -232,7 +232,9 @@ void Updates::installUpdates()
 
 void Updates::checkForUpdates()
 {
-    if (!Version::instance().isSupportedOS())
+    auto version = Version::instance();
+
+    if (!version.isSupportedOS())
     {
         qCDebug(chatterinoUpdate)
             << "Update checking disabled because OS doesn't appear to be one "
@@ -241,7 +243,7 @@ void Updates::checkForUpdates()
     }
 
     // Disable updates on Flatpak
-    if (QFileInfo::exists("/.flatpak-info"))
+    if (version.isFlatpak())
     {
         return;
     }
diff --git a/src/singletons/WindowManager.cpp b/src/singletons/WindowManager.cpp
index af66ffcad..254b8b767 100644
--- a/src/singletons/WindowManager.cpp
+++ b/src/singletons/WindowManager.cpp
@@ -379,20 +379,20 @@ void WindowManager::save()
     QJsonDocument document;
 
     // "serialize"
-    QJsonArray window_arr;
+    QJsonArray windowArr;
     for (Window *window : this->windows_)
     {
-        QJsonObject window_obj;
+        QJsonObject windowObj;
 
         // window type
         switch (window->getType())
         {
             case WindowType::Main:
-                window_obj.insert("type", "main");
+                windowObj.insert("type", "main");
                 break;
 
             case WindowType::Popup:
-                window_obj.insert("type", "popup");
+                windowObj.insert("type", "popup");
                 break;
 
             case WindowType::Attached:;
@@ -400,68 +400,48 @@ void WindowManager::save()
 
         if (window->isMaximized())
         {
-            window_obj.insert("state", "maximized");
+            windowObj.insert("state", "maximized");
         }
         else if (window->isMinimized())
         {
-            window_obj.insert("state", "minimized");
+            windowObj.insert("state", "minimized");
         }
 
         // window geometry
         auto rect = window->getBounds();
 
-        window_obj.insert("x", rect.x());
-        window_obj.insert("y", rect.y());
-        window_obj.insert("width", rect.width());
-        window_obj.insert("height", rect.height());
+        windowObj.insert("x", rect.x());
+        windowObj.insert("y", rect.y());
+        windowObj.insert("width", rect.width());
+        windowObj.insert("height", rect.height());
 
-        QJsonObject emote_popup_obj;
-        emote_popup_obj.insert("x", this->emotePopupPos_.x());
-        emote_popup_obj.insert("y", this->emotePopupPos_.y());
-        window_obj.insert("emotePopup", emote_popup_obj);
+        QJsonObject emotePopupObj;
+        emotePopupObj.insert("x", this->emotePopupPos_.x());
+        emotePopupObj.insert("y", this->emotePopupPos_.y());
+        windowObj.insert("emotePopup", emotePopupObj);
 
         // window tabs
-        QJsonArray tabs_arr;
+        QJsonArray tabsArr;
 
-        for (int tab_i = 0; tab_i < window->getNotebook().getPageCount();
-             tab_i++)
+        for (int tabIndex = 0; tabIndex < window->getNotebook().getPageCount();
+             tabIndex++)
         {
-            QJsonObject tab_obj;
+            QJsonObject tabObj;
             SplitContainer *tab = dynamic_cast<SplitContainer *>(
-                window->getNotebook().getPageAt(tab_i));
+                window->getNotebook().getPageAt(tabIndex));
             assert(tab != nullptr);
 
-            // custom tab title
-            if (tab->getTab()->hasCustomTitle())
-            {
-                tab_obj.insert("title", tab->getTab()->getCustomTitle());
-            }
-
-            // selected
-            if (window->getNotebook().getSelectedPage() == tab)
-            {
-                tab_obj.insert("selected", true);
-            }
-
-            // highlighting on new messages
-            tab_obj.insert("highlightsEnabled",
-                           tab->getTab()->hasHighlightsEnabled());
-
-            // splits
-            QJsonObject splits;
-
-            this->encodeNodeRecursively(tab->getBaseNode(), splits);
-
-            tab_obj.insert("splits2", splits);
-            tabs_arr.append(tab_obj);
+            bool isSelected = window->getNotebook().getSelectedPage() == tab;
+            WindowManager::encodeTab(tab, isSelected, tabObj);
+            tabsArr.append(tabObj);
         }
 
-        window_obj.insert("tabs", tabs_arr);
-        window_arr.append(window_obj);
+        windowObj.insert("tabs", tabsArr);
+        windowArr.append(windowObj);
     }
 
     QJsonObject obj;
-    obj.insert("windows", window_arr);
+    obj.insert("windows", windowArr);
     document.setObject(obj);
 
     // save file
@@ -497,6 +477,32 @@ void WindowManager::queueSave()
     this->saveTimer->start(10s);
 }
 
+void WindowManager::encodeTab(SplitContainer *tab, bool isSelected,
+                              QJsonObject &obj)
+{
+    // custom tab title
+    if (tab->getTab()->hasCustomTitle())
+    {
+        obj.insert("title", tab->getTab()->getCustomTitle());
+    }
+
+    // selected
+    if (isSelected)
+    {
+        obj.insert("selected", true);
+    }
+
+    // highlighting on new messages
+    obj.insert("highlightsEnabled", tab->getTab()->hasHighlightsEnabled());
+
+    // splits
+    QJsonObject splits;
+
+    WindowManager::encodeNodeRecursively(tab->getBaseNode(), splits);
+
+    obj.insert("splits2", splits);
+}
+
 void WindowManager::encodeNodeRecursively(SplitNode *node, QJsonObject &obj)
 {
     switch (node->getType())
@@ -506,11 +512,12 @@ void WindowManager::encodeNodeRecursively(SplitNode *node, QJsonObject &obj)
             obj.insert("moderationMode", node->getSplit()->getModerationMode());
 
             QJsonObject split;
-            encodeChannel(node->getSplit()->getIndirectChannel(), split);
+            WindowManager::encodeChannel(node->getSplit()->getIndirectChannel(),
+                                         split);
             obj.insert("data", split);
 
             QJsonArray filters;
-            encodeFilters(node->getSplit(), filters);
+            WindowManager::encodeFilters(node->getSplit(), filters);
             obj.insert("filters", filters);
         }
         break;
@@ -520,14 +527,14 @@ void WindowManager::encodeNodeRecursively(SplitNode *node, QJsonObject &obj)
                                    ? "horizontal"
                                    : "vertical");
 
-            QJsonArray items_arr;
+            QJsonArray itemsArr;
             for (const std::unique_ptr<SplitNode> &n : node->getChildren())
             {
                 QJsonObject subObj;
-                this->encodeNodeRecursively(n.get(), subObj);
-                items_arr.append(subObj);
+                WindowManager::encodeNodeRecursively(n.get(), subObj);
+                itemsArr.append(subObj);
             }
-            obj.insert("items", items_arr);
+            obj.insert("items", itemsArr);
         }
         break;
     }
diff --git a/src/singletons/WindowManager.hpp b/src/singletons/WindowManager.hpp
index 42a6f5d51..87151d204 100644
--- a/src/singletons/WindowManager.hpp
+++ b/src/singletons/WindowManager.hpp
@@ -30,6 +30,8 @@ public:
     WindowManager();
     ~WindowManager() override;
 
+    static void encodeTab(SplitContainer *tab, bool isSelected,
+                          QJsonObject &obj);
     static void encodeChannel(IndirectChannel channel, QJsonObject &obj);
     static void encodeFilters(Split *split, QJsonArray &arr);
     static IndirectChannel decodeChannel(const SplitDescriptor &descriptor);
@@ -99,7 +101,8 @@ public:
     pajlada::Signals::Signal<SplitContainer *> selectSplitContainer;
 
 private:
-    void encodeNodeRecursively(SplitContainer::Node *node, QJsonObject &obj);
+    static void encodeNodeRecursively(SplitContainer::Node *node,
+                                      QJsonObject &obj);
 
     // Load window layout from the window-layout.json file
     WindowLayout loadWindowLayoutFromFile() const;
diff --git a/src/util/StreamLink.cpp b/src/util/StreamLink.cpp
index b631cad51..8b61ca9d7 100644
--- a/src/util/StreamLink.cpp
+++ b/src/util/StreamLink.cpp
@@ -10,6 +10,7 @@
 #include <QFileInfo>
 #include <QProcess>
 #include "common/QLogging.hpp"
+#include "common/Version.hpp"
 
 #include <functional>
 
@@ -35,18 +36,6 @@ namespace {
 #endif
     }
 
-    QString getStreamlinkProgram()
-    {
-        if (getSettings()->streamlinkUseCustomPath)
-        {
-            return getSettings()->streamlinkPath + "/" + getBinaryName();
-        }
-        else
-        {
-            return getBinaryName();
-        }
-    }
-
     bool checkStreamlinkPath(const QString &path)
     {
         QFileInfo fileinfo(path);
@@ -83,7 +72,27 @@ namespace {
     QProcess *createStreamlinkProcess()
     {
         auto p = new QProcess;
-        p->setProgram(getStreamlinkProgram());
+
+        const QString path = [] {
+            if (getSettings()->streamlinkUseCustomPath)
+            {
+                return getSettings()->streamlinkPath + "/" + getBinaryName();
+            }
+            else
+            {
+                return QString{getBinaryName()};
+            }
+        }();
+
+        if (Version::instance().isFlatpak())
+        {
+            p->setProgram("flatpak-spawn");
+            p->setArguments({"--host", path});
+        }
+        else
+        {
+            p->setProgram(path);
+        }
 
         QObject::connect(p, &QProcess::errorOccurred, [=](auto err) {
             if (err == QProcess::FailedToStart)
@@ -165,7 +174,8 @@ void getStreamQualities(const QString &channelURL,
             }
         });
 
-    p->setArguments({channelURL, "--default-stream=KKona"});
+    p->setArguments(p->arguments() +
+                    QStringList{channelURL, "--default-stream=KKona"});
 
     p->start();
 }
@@ -173,7 +183,9 @@ void getStreamQualities(const QString &channelURL,
 void openStreamlink(const QString &channelURL, const QString &quality,
                     QStringList extraArguments)
 {
-    QStringList arguments = extraArguments << channelURL << quality;
+    auto proc = createStreamlinkProcess();
+    auto arguments = proc->arguments()
+                     << extraArguments << channelURL << quality;
 
     // Remove empty arguments before appending additional streamlink options
     // as the options might purposely contain empty arguments
@@ -182,7 +194,8 @@ void openStreamlink(const QString &channelURL, const QString &quality,
     QString additionalOptions = getSettings()->streamlinkOpts.getValue();
     arguments << splitCommand(additionalOptions);
 
-    bool res = QProcess::startDetached(getStreamlinkProgram(), arguments);
+    proc->setArguments(std::move(arguments));
+    bool res = proc->startDetached();
 
     if (!res)
     {
diff --git a/src/widgets/Window.cpp b/src/widgets/Window.cpp
index 932e05fd5..dea06c69c 100644
--- a/src/widgets/Window.cpp
+++ b/src/widgets/Window.cpp
@@ -338,6 +338,14 @@ void Window::addShortcuts()
         }
     });
 
+    createWindowShortcut(this, "CTRL+SHIFT+N", [this] {
+        if (auto page = dynamic_cast<SplitContainer *>(
+                this->notebook_->getSelectedPage()))
+        {
+            page->popup();
+        }
+    });
+
     // Zoom in
     {
         auto s = new QShortcut(QKeySequence::ZoomIn, this);
diff --git a/src/widgets/dialogs/UserInfoPopup.cpp b/src/widgets/dialogs/UserInfoPopup.cpp
index 706ca839d..6138962e2 100644
--- a/src/widgets/dialogs/UserInfoPopup.cpp
+++ b/src/widgets/dialogs/UserInfoPopup.cpp
@@ -33,7 +33,7 @@
 const QString TEXT_VIEWS("Views: %1");
 const QString TEXT_FOLLOWERS("Followers: %1");
 const QString TEXT_CREATED("Created: %1");
-const QString TEXT_TITLE("%1's Usercard");
+const QString TEXT_TITLE("%1's Usercard - #%2");
 #define TEXT_USER_ID "ID: "
 #define TEXT_UNAVAILABLE "(not available)"
 
@@ -513,7 +513,7 @@ void UserInfoPopup::setData(const QString &name, const ChannelPtr &channel)
 {
     this->userName_ = name;
     this->channel_ = channel;
-    this->setWindowTitle(TEXT_TITLE.arg(name));
+    this->setWindowTitle(TEXT_TITLE.arg(name, channel->getName()));
 
     this->ui_.nameLabel->setText(name);
     this->ui_.nameLabel->setProperty("copy-text", name);
@@ -598,7 +598,8 @@ void UserInfoPopup::updateUserData()
         this->avatarUrl_ = user.profileImageUrl;
 
         this->ui_.nameLabel->setText(user.displayName);
-        this->setWindowTitle(TEXT_TITLE.arg(user.displayName));
+        this->setWindowTitle(
+            TEXT_TITLE.arg(user.displayName, this->channel_->getName()));
         this->ui_.viewCountLabel->setText(
             TEXT_VIEWS.arg(localizeNumbers(user.viewCount)));
         this->ui_.createdDateLabel->setText(
diff --git a/src/widgets/helper/NotebookTab.cpp b/src/widgets/helper/NotebookTab.cpp
index 9fdd41db0..bb53599fc 100644
--- a/src/widgets/helper/NotebookTab.cpp
+++ b/src/widgets/helper/NotebookTab.cpp
@@ -64,6 +64,16 @@ NotebookTab::NotebookTab(Notebook *notebook)
         this->notebook_->removePage(this->page);
     });
 
+    this->menu_.addAction(
+        "Popup Tab",
+        [=]() {
+            if (auto container = dynamic_cast<SplitContainer *>(this->page))
+            {
+                container->popup();
+            }
+        },
+        QKeySequence("Ctrl+Shift+N"));
+
     highlightNewMessagesAction_ =
         new QAction("Mark Tab as Unread on New Messages", &this->menu_);
     highlightNewMessagesAction_->setCheckable(true);
diff --git a/src/widgets/settingspages/KeyboardSettingsPage.cpp b/src/widgets/settingspages/KeyboardSettingsPage.cpp
index 7cad92a5f..fcdc69a00 100644
--- a/src/widgets/settingspages/KeyboardSettingsPage.cpp
+++ b/src/widgets/settingspages/KeyboardSettingsPage.cpp
@@ -44,6 +44,8 @@ KeyboardSettingsPage::KeyboardSettingsPage()
     form->addRow(new QLabel("Ctrl + Shift + T"), new QLabel("Create new tab"));
     form->addRow(new QLabel("Ctrl + Shift + W"),
                  new QLabel("Close current tab"));
+    form->addRow(new QLabel("Ctrl + Shift + N"),
+                 new QLabel("Open current tab as a popup"));
     form->addRow(new QLabel("Ctrl + H"),
                  new QLabel("Hide/Show similar messages (See General->R9K)"));
 
diff --git a/src/widgets/splits/SplitContainer.cpp b/src/widgets/splits/SplitContainer.cpp
index 4a04ba199..5e1543c95 100644
--- a/src/widgets/splits/SplitContainer.cpp
+++ b/src/widgets/splits/SplitContainer.cpp
@@ -9,6 +9,7 @@
 #include "util/Helpers.hpp"
 #include "util/LayoutCreator.hpp"
 #include "widgets/Notebook.hpp"
+#include "widgets/Window.hpp"
 #include "widgets/helper/ChannelView.hpp"
 #include "widgets/helper/NotebookTab.hpp"
 #include "widgets/splits/ClosedSplits.hpp"
@@ -761,6 +762,33 @@ void SplitContainer::applyFromDescriptor(const NodeDescriptor &rootNode)
     this->layout();
 }
 
+void SplitContainer::popup()
+{
+    Window &window = getApp()->windows->createWindow(WindowType::Popup);
+    auto popupContainer = window.getNotebook().getOrAddSelectedPage();
+
+    QJsonObject encodedTab;
+    WindowManager::encodeTab(this, true, encodedTab);
+    TabDescriptor tab = TabDescriptor::loadFromJSON(encodedTab);
+
+    // custom title
+    if (!tab.customTitle_.isEmpty())
+    {
+        popupContainer->getTab()->setCustomTitle(tab.customTitle_);
+    }
+
+    // highlighting on new messages
+    popupContainer->getTab()->setHighlightsEnabled(tab.highlightsEnabled_);
+
+    // splits
+    if (tab.rootNode_)
+    {
+        popupContainer->applyFromDescriptor(*tab.rootNode_);
+    }
+
+    window.show();
+}
+
 void SplitContainer::applyFromDescriptorRecursively(
     const NodeDescriptor &rootNode, Node *node)
 {
diff --git a/src/widgets/splits/SplitContainer.hpp b/src/widgets/splits/SplitContainer.hpp
index bb26e43dc..1662f0b68 100644
--- a/src/widgets/splits/SplitContainer.hpp
+++ b/src/widgets/splits/SplitContainer.hpp
@@ -202,6 +202,8 @@ public:
 
     void applyFromDescriptor(const NodeDescriptor &rootNode);
 
+    void popup();
+
 protected:
     void paintEvent(QPaintEvent *event) override;
 
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 8b1fafe99..4c15a4902 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -2,6 +2,7 @@ project(chatterino-test)
 
 set(test_SOURCES
     ${CMAKE_CURRENT_LIST_DIR}/src/main.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/src/ChannelChatters.cpp
     ${CMAKE_CURRENT_LIST_DIR}/src/AccessGuard.cpp
     ${CMAKE_CURRENT_LIST_DIR}/src/NetworkCommon.cpp
     ${CMAKE_CURRENT_LIST_DIR}/src/NetworkRequest.cpp
diff --git a/tests/src/ChannelChatters.cpp b/tests/src/ChannelChatters.cpp
new file mode 100644
index 000000000..e0006a205
--- /dev/null
+++ b/tests/src/ChannelChatters.cpp
@@ -0,0 +1,113 @@
+#include "common/ChannelChatters.hpp"
+
+#include <gtest/gtest.h>
+#include <QColor>
+#include <QStringList>
+
+namespace chatterino {
+
+class MockChannel : public Channel
+{
+public:
+    MockChannel(const QString &name)
+        : Channel(name, Channel::Type::Twitch)
+    {
+    }
+};
+
+}  // namespace chatterino
+
+using namespace chatterino;
+
+// Ensure inserting the same user does not increase the size of the stored colors
+TEST(ChatterChatters, insertSameUser)
+{
+    MockChannel channel("test");
+
+    ChannelChatters chatters(channel);
+
+    EXPECT_EQ(chatters.colorsSize(), 0);
+    chatters.setUserColor("pajlada", QColor("#fff"));
+    EXPECT_EQ(chatters.colorsSize(), 1);
+    chatters.setUserColor("pajlada", QColor("#fff"));
+    EXPECT_EQ(chatters.colorsSize(), 1);
+}
+
+// Ensure we can update a chatters color
+TEST(ChatterChatters, insertSameUserUpdatesColor)
+{
+    MockChannel channel("test");
+
+    ChannelChatters chatters(channel);
+
+    chatters.setUserColor("pajlada", QColor("#fff"));
+    EXPECT_EQ(chatters.getUserColor("pajlada"), QColor("#fff"));
+    chatters.setUserColor("pajlada", QColor("#f0f"));
+    EXPECT_EQ(chatters.getUserColor("pajlada"), QColor("#f0f"));
+}
+
+// Ensure getting a non-existant users color returns an invalid QColor
+TEST(ChatterChatters, getNonExistantUser)
+{
+    MockChannel channel("test");
+
+    ChannelChatters chatters(channel);
+
+    EXPECT_EQ(chatters.getUserColor("nonexistantuser"), QColor());
+}
+
+// Ensure getting a user doesn't create an entry
+TEST(ChatterChatters, getDoesNotCreate)
+{
+    MockChannel channel("test");
+
+    ChannelChatters chatters(channel);
+
+    EXPECT_EQ(chatters.colorsSize(), 0);
+    chatters.getUserColor("nonexistantuser");
+    EXPECT_EQ(chatters.colorsSize(), 0);
+}
+
+// Ensure the least recently used entry is purged when we reach MAX_SIZE
+TEST(ChatterChatters, insertMaxSize)
+{
+    MockChannel channel("test");
+
+    ChannelChatters chatters(channel);
+
+    // Prime chatters with 2 control entries
+    chatters.setUserColor("pajlada", QColor("#f00"));
+    chatters.setUserColor("zneix", QColor("#f0f"));
+
+    EXPECT_EQ(chatters.getUserColor("pajlada"), QColor("#f00"));
+    EXPECT_EQ(chatters.getUserColor("zneix"), QColor("#f0f"));
+    EXPECT_EQ(chatters.getUserColor("nonexistantuser"), QColor());
+
+    EXPECT_EQ(chatters.colorsSize(), 2);
+
+    for (int i = 0; i < ChannelChatters::maxChatterColorCount - 1; ++i)
+    {
+        auto username = QString("user%1").arg(i);
+        chatters.setUserColor(username, QColor("#00f"));
+    }
+
+    // Should have bumped ONE entry out (pajlada)
+
+    EXPECT_EQ(chatters.getUserColor("pajlada"), QColor());
+    EXPECT_EQ(chatters.getUserColor("zneix"), QColor("#f0f"));
+    EXPECT_EQ(chatters.getUserColor("user1"), QColor("#00f"));
+
+    chatters.setUserColor("newuser", QColor("#00e"));
+
+    for (int i = 0; i < ChannelChatters::maxChatterColorCount; ++i)
+    {
+        auto username = QString("user%1").arg(i);
+        chatters.setUserColor(username, QColor("#00f"));
+    }
+
+    // One more entry should be bumped out (zneix)
+
+    EXPECT_EQ(chatters.getUserColor("pajlada"), QColor());
+    EXPECT_EQ(chatters.getUserColor("zneix"), QColor());
+    EXPECT_EQ(chatters.getUserColor("user1"), QColor("#00f"));
+}