+** Firefox
+*** Swap tab and URL bars
+#+begin_src css :tangle ~/.mozilla/firefox/armaan-release/chrome/userChrome.css
+ #nav-bar {
+ -moz-box-ordinal-group: 1 !important;
+ }
+
+ #PersonalToolbar {
+ -moz-box-ordinal-group: 2 !important;
+ }
+
+ #titlebar {
+ -moz-box-ordinal-group: 3 !important;
+ }
+#+end_src
+*** Hide URL bar when not focused.
+#+begin_src css :tangle ~/.mozilla/firefox/armaan-release/chrome/userChrome.css
+ #navigator-toolbox:not(:focus-within):not(:hover) {
+ margin-top: -30px;
+ }
+
+ #navigator-toolbox {
+ transition: 0.1s margin-top ease-out;
+ }
+#+end_src
+** Black screen by default
+#+begin_src css :tangle ~/.mozilla/firefox/armaan-release/chrome/userChrome.css
+ #main-window,
+ #browser,
+ #browser vbox#appcontent tabbrowser,
+ #content,
+ #tabbrowser-tabpanels,
+ #tabbrowser-tabbox,
+ browser[type="content-primary"],
+ browser[type="content"] > html,
+ .browserContainer {
+ background: black !important;
+ color: #fff !important;
+ }
+#+end_src
+#+begin_src css :tangle ~/.mozilla/firefox/armaan-release/chrome/userContent.css
+ @-moz-document url("about:home"), url("about:blank"), url("about:newtab") {
+ body {
+ background: black !important;
+ }
+ }
+#+end_src