As in the topic, FF updated broke everything. Fortunately, I managed to get it somewhat working again but there are new problems. My menu bar now is under bookmarks and some weird empty bar showed up under my tabs. HOW TO FIX IT?! HELP! my userChrome.css config /* Firefox Quantum userChrome.css tweaks ********************************************************/ /* code mostly taken from 'Classic Theme Restorer' & 'Classic Toolbar Buttons' add-ons **********/ /* Github: https://github.com/aris-t2/customcssforfx ********************************************/ /************************************************************************************************/ /************************************************************************************************/ /* Custom CSS for Firefox 60+ *******************************************************************/ /* version 2.4.0 ********************************************************************************/ /************************************************************************************************/ /************************************************************************************************* *************************************************************************************************/ /************************************************************************************************/ /* CONFIGURATION FILES - edit target files to change general values *****************************/ /************************************************************************************************/ /* GENERAL VARIABLES ****************************************************************************/ /* [!] set global variables for font and tab size options and more inside target file ***********/ @import "./config/general_variables.css"; /**/ /* COLOR VARIABLES FOR DEFAULT BROWSER THEME ONLY - MAIN UI - [only use one at a time] **********/ /* [!] set own colors for tabs & toolbars inside 'color_variables.css' or use available presets */ /* [!] 'about:config > ui.systemUsesDarkTheme > 0' might be required in some cases **************/ /* [!] enabled 'menubar_color.css' and 'statusbar_color.css' might be required in some cases ****/ @import "./config/color_variables.css"; /**/ /* <- default 'grey' colors */ /* @import "./config/color_variables_aero.css"; /**/ /* <- 'AeroBlue' colors (Win 7 Aero) */ /* @import "./config/color_variables_classic-grey.css"; /**/ /* <- 'classic grey' colors (Win Classic) */ /* @import "./config/color_variables_fx3.css"; /**/ /* <- 'Firefox 3-like' blueish colors */ /* @import "./config/color_variables_transparent.css"; /**/ /* <- (semi-)'transparent' colors */ /* @import "./config/color_variables_aeroglass.css"; /**/ /* <- 'AeroGlass' colors / Win10+Glass8 fix can be found in 'toolbars' area */ /* @import "./config/color_variables_deved.css"; /**/ /* <- based on 'Developer Edition' colors */ /* @import "./config/color_variables_noia4_grey.css"; /**/ /* <- based on 'Noia 4 themes' grey colors */ /* @import "./config/color_variables_noia4_lightgrey.css"; /**/ /* <- based on 'Noia 4 themes' lightgrey colors */ /* @import "./config/color_variables_noia4_dark.css"; /**/ /* <- based on 'Noia 4 themes' dark colors */ /* Darker "Dark" default theme - [only use one at a time] ***************************************/ /* @import "./css/toolbars/default_dark_theme_darker.css"; /**/ /* @import "./css/toolbars/default_dark_theme_darker_v2.css"; /**/ /* CUSTOM SCROLLBARS VARIABLES (Firefox 63+ only) - EXPERIMENTAL ********************************/ /* [!] Might not work on every page! This issue is for Mozilla to solve. ************************/ /* [!] not compatible with custom scrollbar JavaScipt userChrome scripts ************************/ /* [!] custom size values only compatible with 'web content' scrollbars at the moment ***********/ /* [!] more info inside 'custom_scrollbar_appearance.css' file **********************************/ /* @import "./config/custom_scrollbar_appearance.css"; /**/ /* <--- EXPERIMENTAL */ /************************************************************************************************/ /* TOOLBAR BUTTONS ******************************************************************************/ /************************************************************************************************/ /* navigation toolbar buttons appearance - [only use one at a time] *****************************/ @import "./css/buttons/buttons_on_navbar_classic_appearance.css"; /**/ /* @import "./css/buttons/buttons_on_navbar_classic_appearance_v2.css"; /**/ /* @import "./css/buttons/buttons_on_navbar_windows_classic_theme_appearance.css"; /**/ /* @import "./css/buttons/buttons_on_navbar_glass_appearance.css"; /* <--- good for Dark themes */ /* @import "./css/buttons/buttons_on_navbar_osx_appearance.css"; /**/ /* navigation toolbar buttons - button roundness (edit file to set different roundness) *********/ /* @import "./css/buttons/buttons_on_navbar_button_roundness.css"; /**/ /* squared buttons / button size - [only use one at a time] *************************************/ /* "rectangular shape" - normal size ************************************************************/ /* @import "./css/buttons/buttons_on_navbar_squared_buttons.css"; /**/ /* "normal shape" - large size (huge 48x48px buttons with 36x36px icons) ************************/ /* [!] not compatible with 'custom icon' options ************************************************/ /* [!] not compatible with 'custom back & forward buttons' appearance options *******************/ /* [!] not compatible with 'text mode' option ***************************************************/ /* [!] partly compatible with 'icons+text' option, if in 'compact mode' *************************/ /* @import "./css/buttons/buttons_on_navbar_huge_48px_size.css"; /