create window_control_force_linux_system_style.css

chrome/window_control_force_linux_system_style.css

@@ -0,0 +1,22 @@
+/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/window_control_force_linux_system_style.css made available under Mozilla Public License v. 2.0
+See the above repository for updates as well as full license text. */
+
+/* This style makes Firefox use your linux system style for window control buttons. Normally those are only used with default system (auto) theme. */
+
+.titlebar-button{
+  list-style-image: none !important;
+  appearance: auto !important;
+}
+
+.titlebar-min {
+  -moz-default-appearance: -moz-window-button-minimize !important;
+}
+.titlebar-max {
+  -moz-default-appearance: -moz-window-button-maximize !important;
+}
+.titlebar-restore {
+  -moz-default-appearance: -moz-window-button-restore !important;
+}
+.titlebar-close {
+  -moz-default-appearance: -moz-window-button-close !important;
+}

html_resources/tagmap.json

@@ -148,5 +148,6 @@
 "page_action_buttons_on_urlbar_hover.css":["urlbar","icon","minimal","autohide"],
 "integrated_searchbar_popup.css":["popup","colors"],
 "context_menus_more_proton.css":["proton","menu"],
-"multi-row_tabs_separate_pinned_row_patch.css":["tabs","multi-row","patch"]
+"multi-row_tabs_separate_pinned_row_patch.css":["tabs","multi-row","patch"],
+"window_control_force_linux_system_style.css":["window-control","buttons","icon"]
 }

tags.csv

@@ -148,3 +148,4 @@ page_action_buttons_on_urlbar_hover.css,urlbar,icon,minimal,autohide
 integrated_searchbar_popup.css,popup,colors
 context_menus_more_proton.css,proton,menu
 multi-row_tabs_separate_pinned_row_patch.css,tabs,multi-row,patch
+window_control_force_linux_system_style.css,window-control,buttons,icon