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--- linux:apps:xfce [2025/09/26 09:25] – oscar
+++ linux:apps:xfce [2025/09/27 07:06] (current) – [Theme per application] oscar
@@ Line 21: / Line 21: @@
     Window Manager (xfwm4) Themes: ~/.local/share/themes/
-=== How to Install a New Theme ===
+==== How to Install a New Theme ====
 Download: the theme file from a source like xfce-look.org. Extract: the theme's downloaded archive.
 Copy: the extracted theme folder (which contains folders like gtk-3.0 for GTK themes or xfwm4 for window manager themes) into one of the user-specific directories mentioned above, such as ~/.local/share/themes/ for GTK/window themes or ~/.local/share/icons/ for icon themes.
 Select: the new theme by opening Menu > Settings > Appearance and choosing your theme from the Style or Icons tabs.
+==== Theme per application ====
+Select an explicit theme for an application:
+  env GTK_THEME=Adwaita:dark simple-scan
+  env GTK_THEME=Nordic-darker simple-scan
+  env GTK_THEME=Shades-of-gray-Orange simple-scan
+  env GTK2_RC_FILES="/usr/share/themes/Ambiance/gtk-2.0/gtkrc" firefox
+Newer versions of firefox use GTK3. Another way to overrule default thema from within Firefox:
+  In Firefox URL bar enter about:config.
+. Create new String value with name widget.content.gtk-theme-override (Right click > new > String)
+. Set value to Adwaita:light (if your distribution does not use GNOME desktop, you should use a name of light GTK theme which is installed on your PC)
+. Restart browser