Narann/firefox_multi_row_tabs_via_userChrome_css.md

## firefox_multi_row_tabs_via_userChrome_css.md

      
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              firefox_multi_row_tabs_via_userChrome_css.md
            
          
    Firefox multi row tabs via userChrome.css

Create a file:
$HOME/.mozilla/firefox/<your profile>/chrome/userChrome.css
With this in it:
.tabbrowser-tab:not([pinned]) {min-width:35px;max-width:35px;}
.tabbrowser-tab,.tab-background {height:var(--tab-min-height);}
.tab-stack {width: 100%;}
#tabbrowser-tabs .scrollbox-innerbox {display: flex;flex-wrap: wrap;}
#tabbrowser-tabs .arrowscrollbox-scrollbox {overflow: visible;display: block;}
#titlebar,#titlebar-buttonbox{height:var(--tab-min-height) !important;}
#titlebar{margin-bottom:calc(var(--tab-min-height)*-1) !important;}
#main-window[sizemode="maximized"] #titlebar{margin-bottom:calc(6px + var(--tab-min-height)*-1) !important;}
#main-window[sizemode="maximized"] #TabsToolbar{margin-left:var(--tab-min-height);}
#titlebar:active{margin-bottom:0 !important;}
#titlebar:active #titlebar-content{margin-bottom:var(--tab-min-height) !important;}
#tabbrowser-tabs .scrollbutton-up,.tabbrowser-tabs .scrollbutton-down,#alltabs-button,.tabbrowser-tab:not([fadein]){display: none;}
Restart Firefox.
New version here.
toolkit.legacyUserProfileCustomizations.stylesheets must be set to true in about:config.
New version (FF 81) here