Are you thinking about opening it for preview?sturmvogel wrote:You need to make Firefox aware of the css file. From Firefox 69 onwards...
/* Hide Tab bar with only one Tab - [110] */
#tabbrowser-tabs .tabbrowser-tab:only-of-type,
#tabbrowser-tabs .tabbrowser-tab:only-of-type + #tabbrowser-arrowscrollbox-periphery{ display:none !important;}
#tabbrowser-tabs, #tabbrowser-arrowscrollbox{ min-height:0!important;}
#alltabs-button{ display:none !important;}
nodoktor5000 wrote:Do you have toolkit.legacyUserProfileCustomizations.stylesheets set to true...
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