firefox: add more user configuration

modules/programs/firefox.nix

@@ -22,6 +22,37 @@
           #id = 271987;
           name = "kabbone";
           isDefault = true;
+          settings = {
+              "media.ffmpeg.vaapi.enabled" = true;
+              "gfx.webrender.all" = true;
+              "browser.contentblocking.category" = "strict";
+              "browser.search.region" = "DE";
+              "extensions.active.ThemeID" = "dreamer-bold-colorway@mozilla.org";
+              "media.autoplay.default" = 0;
+              "security.enterprise_roots.enabled" = true;
+              "widget.gtk.overlay-scrollbars.enabled" = true;
+              "signon.rememberSignons" = false;
+              "extensions.formautofill.creditCards.enabled" = false;
+              "datareporting.healthreport.uploadEnabled" = false;
+              "browser.urlbar.placeholderName" = "DuckDuckGo";
+              "browser.urlbar.placeholderName.private" = "DuckDuckGo";
+              "browser.theme.toolbar-theme" = 0;
+          };
+
+          userChrome = ''
+            /* Hide tab bar in FF Quantum */
+            @-moz-document url("chrome://browser/content/browser.xul") {
+              #TabsToolbar {
+                visibility: collapse !important;
+                margin-bottom: 21px !important;
+              }
+            
+              #sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header {
+                visibility: collapse !important;
+              }
+            }
+          '';
+
           search = {
             engines = {
               "Nix Packages" = {