Created
November 14, 2017 19:42
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Hide tab bar top of FF 57
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@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); | |
#TabsToolbar { visibility: collapse; } |
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about:support
, mkdirchrome
, put this fileabout:config
toggletoolkit.legacyUserProfileCustomizations.stylesheets