diff --git a/dotfiles/firefox/chrome/userChrome.css b/dotfiles/firefox/chrome/userChrome.css
new file mode 100644
index 0000000..2b0bc43
--- /dev/null
+++ b/dotfiles/firefox/chrome/userChrome.css
@@ -0,0 +1,52 @@
+/*
+ _____ _           __
+|  ___(_)_ __ ___ / _| _____  __
+| |_  | | '__/ _ \ |_ / _ \ \/ /
+|  _| | | | |  __/  _| (_) >  <
+|_|   |_|_|  \___|_|  \___/_/\_\
+*/
+
+/*** BEGIN Firefox 77 (June 2, 2020) Override URL bar enlargement ***/
+
+  /* Compute new position, width, and padding */
+
+  #urlbar[breakout][breakout-extend] {
+    top: 5px !important;
+    left: 0px !important;
+    width: 100% !important;
+    padding: 0px !important;
+  }
+  /* for alternate Density settings */
+  [uidensity="compact"] #urlbar[breakout][breakout-extend] {
+    top: 3px !important;
+  }
+  [uidensity="touch"] #urlbar[breakout][breakout-extend] {
+    top: 4px !important;
+  }
+
+  /* Prevent shift of URL bar contents */
+
+  #urlbar[breakout][breakout-extend] > #urlbar-input-container {
+    height: var(--urlbar-height) !important;
+    padding: 0 !important;
+  }
+
+  /* Do not animate */
+
+  #urlbar[breakout][breakout-extend] > #urlbar-background {
+    animation: none !important;;
+  }
+
+  /* Remove shadows */
+
+  #urlbar[breakout][breakout-extend] > #urlbar-background {
+    box-shadow: none !important;
+  }
+
+/*** END Firefox 77 (June 2, 2020) Override URL bar enlargement ***/
+/*** BEGIN Remove webRTC indicator ***/
+
+#webrtcIndicator {
+  display: none;
+}
+/*** END Remove webRTC indicator ***/
diff --git a/dotfiles/firefox/user.js b/dotfiles/firefox/user.js
new file mode 100644
index 0000000..442e234
--- /dev/null
+++ b/dotfiles/firefox/user.js
@@ -0,0 +1,65 @@
+/*
+ _____ _           __
+|  ___(_)_ __ ___ / _| _____  __
+| |_  | | '__/ _ \ |_ / _ \ \/ /
+|  _| | | | |  __/  _| (_) >  <
+|_|   |_|_|  \___|_|  \___/_/\_\
+*/
+
+// scroll pixel by pixel holding Alt
+user_pref("mousewheel.system_scroll_override_on_root_content.enabled", true);
+user_pref("mousewheel.with_alt.action", 1);
+user_pref("mousewheel.with_alt.delta_multiplier_y", 5);
+
+// don't show menu bar on Alt
+user_pref("ui.key.menuAccessKeyFocuses", false);
+
+user_pref("general.autoScroll", true);
+user_pref("devtools.inspector.three-pane-enabled", false);
+
+user_pref("security.dialog_enable_delay", 0);
+user_pref("browser.discovery.enabled", false);
+user_pref("browser.aboutConfig.showWarning", false);
+user_pref("browser.tabs.warnOnClose", false);
+user_pref("browser.newtabpage.enabled", false);
+user_pref("browser.startup.homepage", "about:blank");
+
+// browser.startup.page
+// Possible values are:
+//  0 => Blank page (Legacy)
+//  1 => Follow setting on Home panel for Home page
+//  2 => Last visited page (Legacy)
+//  3 => Restore previous session
+user_pref("browser.startup.page", 3);
+
+// compact density
+user_pref("browser.compactmode.show", true);
+user_pref("browser.uidensity", 1);
+
+// don't save passwords
+user_pref("signon.rememberSignons", false);
+
+// Disable the redesign
+user_pref("browser.proton.contextmenus.enabled", false);
+user_pref("browser.proton.doorhangers.enabled", false);
+user_pref("browser.proton.enabled", false);
+user_pref("browser.proton.modals.enabled", false);
+
+// Enalbe custom css
+user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
+
+// Ui customization
+user_pref("browser.uiCustomization.state", "{\"placements\":{\"widget-overflow-fixed-list\":[\"ublock0_raymondhill_net-browser-action\",\"sponsorblocker_ajay_app-browser-action\",\"addon_darkreader_org-browser-action\",\"tab-session-manager_sienori-browser-action\",\"fxa-toolbar-menu-button\"],\"nav-bar\":[\"back-button\",\"forward-button\",\"stop-reload-button\",\"customizableui-special-spring1\",\"urlbar-container\",\"customizableui-special-spring2\",\"downloads-button\"],\"toolbar-menubar\":[\"menubar-items\"],\"TabsToolbar\":[\"tabbrowser-tabs\",\"new-tab-button\",\"alltabs-button\"],\"PersonalToolbar\":[\"import-button\",\"personal-bookmarks\"]},\"seen\":[\"save-to-pocket-button\",\"developer-button\",\"chrome-gnome-shell_gnome_org-browser-action\",\"_contain-facebook-browser-action\",\"sponsorblocker_ajay_app-browser-action\",\"ublock0_raymondhill_net-browser-action\",\"addon_darkreader_org-browser-action\",\"_e4a8a97b-f2ed-450b-b12d-ee082ba24781_-browser-action\",\"_48748554-4c01-49e8-94af-79662bf34d50_-browser-action\",\"tab-session-manager_sienori-browser-action\"],\"dirtyAreaCache\":[\"nav-bar\",\"PersonalToolbar\",\"toolbar-menubar\",\"TabsToolbar\",\"widget-overflow-fixed-list\"],\"currentVersion\":17,\"newElementCount\":5}");
+
+
+user_pref("devtools.chrome.enabled", true);
+user_pref("devtools.command-button-measure.enabled", true);
+user_pref("devtools.command-button-rulers.enabled", true);
+user_pref("devtools.dom.enabled", true);
+
+user_pref("devtools.editor.keymap", "emacs");
+user_pref("devtools.editor.tabsize", 4);
+user_pref("devtools.inspector.activeSidebar", "ruleview");
+user_pref("devtools.inspector.three-pane-enabled", false);
+user_pref("devtools.responsive.leftAlignViewport.enabled", true);
+user_pref("devtools.theme", "dark");