diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8dd896f0115..77d227334ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unversioned
 
+- Minor: Treat all browsers starting with `firefox` as a Firefox browser. (#5805)
+- Minor: Remove incognito browser support for `opera/launcher` (this should no longer be a thing). (#5805)
 - Bugfix: Fixed a crash relating to Lua HTTP. (#5800)
 - Dev: Updated Conan dependencies. (#5776)
 
diff --git a/src/util/IncognitoBrowser.cpp b/src/util/IncognitoBrowser.cpp
index 3d147b6f756..bb71e7e0c8c 100644
--- a/src/util/IncognitoBrowser.cpp
+++ b/src/util/IncognitoBrowser.cpp
@@ -5,6 +5,7 @@
 #    include "util/XDGHelper.hpp"
 #endif
 
+#include <QFileInfo>
 #include <QProcess>
 #include <QVariant>
 
@@ -12,52 +13,6 @@ namespace {
 
 using namespace chatterino;
 
-QString getPrivateSwitch(const QString &browserExecutable)
-{
-    // list of command line switches to turn on private browsing in browsers
-    static auto switches = std::vector<std::pair<QString, QString>>{
-        {"firefox", "-private-window"},
-        {"librewolf", "-private-window"},
-        {"waterfox", "-private-window"},
-        {"icecat", "-private-window"},
-        {"chrome", "-incognito"},
-        {"google-chrome-stable", "-incognito"},
-        {"vivaldi", "-incognito"},
-        {"opera", "-newprivatetab"},
-        {"opera\\launcher", "--private"},
-        {"iexplore", "-private"},
-        {"msedge", "-inprivate"},
-        {"firefox-esr", "-private-window"},
-        {"chromium", "-incognito"},
-        {"brave", "-incognito"},
-        {"firefox-devedition", "-private-window"},
-        {"firefox-developer-edition", "-private-window"},
-        {"firefox-beta", "-private-window"},
-        {"firefox-nightly", "-private-window"},
-    };
-
-    // compare case-insensitively
-    auto lowercasedBrowserExecutable = browserExecutable.toLower();
-
-#ifdef Q_OS_WINDOWS
-    if (lowercasedBrowserExecutable.endsWith(".exe"))
-    {
-        lowercasedBrowserExecutable.chop(4);
-    }
-#endif
-
-    for (const auto &switch_ : switches)
-    {
-        if (lowercasedBrowserExecutable.endsWith(switch_.first))
-        {
-            return switch_.second;
-        }
-    }
-
-    // couldn't match any browser -> unknown browser
-    return {};
-}
-
 QString getDefaultBrowserExecutable()
 {
 #ifdef USEWINSDK
@@ -102,9 +57,62 @@ QString getDefaultBrowserExecutable()
 }
 
 }  // namespace
+//
+
+namespace chatterino::incognitobrowser::detail {
+
+QString getPrivateSwitch(const QString &browserExecutable)
+{
+    static auto switches = std::vector<std::pair<QString, QString>>{
+        {"librewolf", "-private-window"},
+        {"waterfox", "-private-window"},
+        {"icecat", "-private-window"},
+        {"chrome", "-incognito"},
+        {"google-chrome-stable", "-incognito"},
+        {"vivaldi", "-incognito"},
+        {"opera", "-newprivatetab"},
+        {"iexplore", "-private"},
+        {"msedge", "-inprivate"},
+        {"chromium", "-incognito"},
+        {"brave", "-incognito"},
+    };
+
+    // the browser executable may be a full path, strip it to its basename and
+    // compare case insensitively
+    auto lowercasedBrowserExecutable =
+        QFileInfo(browserExecutable).baseName().toLower();
+
+#ifdef Q_OS_WINDOWS
+    if (lowercasedBrowserExecutable.endsWith(".exe"))
+    {
+        lowercasedBrowserExecutable.chop(4);
+    }
+#endif
+
+    for (const auto &switch_ : switches)
+    {
+        if (lowercasedBrowserExecutable == switch_.first)
+        {
+            return switch_.second;
+        }
+    }
+
+    // catch all mozilla distributed variants
+    if (lowercasedBrowserExecutable.startsWith("firefox"))
+    {
+        return "-private-window";
+    }
+
+    // couldn't match any browser -> unknown browser
+    return {};
+}
+
+}  // namespace chatterino::incognitobrowser::detail
 
 namespace chatterino {
 
+using namespace chatterino::incognitobrowser::detail;
+
 bool supportsIncognitoLinks()
 {
     auto browserExe = getDefaultBrowserExecutable();
diff --git a/src/util/IncognitoBrowser.hpp b/src/util/IncognitoBrowser.hpp
index 9db1e800f4b..86908aa2d8d 100644
--- a/src/util/IncognitoBrowser.hpp
+++ b/src/util/IncognitoBrowser.hpp
@@ -2,6 +2,12 @@
 
 #include <QString>
 
+namespace chatterino::incognitobrowser::detail {
+
+QString getPrivateSwitch(const QString &browserExecutable);
+
+}  // namespace chatterino::incognitobrowser::detail
+
 namespace chatterino {
 
 bool supportsIncognitoLinks();
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 06349c0e0a4..65e619c0402 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -52,6 +52,7 @@ set(test_SOURCES
     ${CMAKE_CURRENT_LIST_DIR}/src/TwitchIrc.cpp
     ${CMAKE_CURRENT_LIST_DIR}/src/IgnoreController.cpp
     ${CMAKE_CURRENT_LIST_DIR}/src/OnceFlag.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/src/IncognitoBrowser.cpp
     ${CMAKE_CURRENT_LIST_DIR}/src/lib/Snapshot.cpp
     ${CMAKE_CURRENT_LIST_DIR}/src/lib/Snapshot.hpp
     # Add your new file above this line!
diff --git a/tests/src/IncognitoBrowser.cpp b/tests/src/IncognitoBrowser.cpp
new file mode 100644
index 00000000000..0eeea9623ae
--- /dev/null
+++ b/tests/src/IncognitoBrowser.cpp
@@ -0,0 +1,21 @@
+#include "util/IncognitoBrowser.hpp"
+
+#include "Test.hpp"
+
+using namespace chatterino;
+
+TEST(IncognitoBrowser, getPrivateSwitch)
+{
+    using namespace chatterino::incognitobrowser::detail;
+
+    ASSERT_EQ(getPrivateSwitch("firefox.exe"), "-private-window");
+    ASSERT_EQ(getPrivateSwitch("firefox"), "-private-window");
+    ASSERT_EQ(getPrivateSwitch("firefox-forsen-version"), "-private-window");
+
+    ASSERT_EQ(getPrivateSwitch("chrome.exe"), "-incognito");
+    ASSERT_EQ(getPrivateSwitch("google-chrome-stable"), "-incognito");
+
+    ASSERT_EQ(getPrivateSwitch("opera.exe"), "-newprivatetab");
+
+    ASSERT_EQ(getPrivateSwitch("unsupportedBrowser.exe"), "");
+}