20 july 2019
Mozilla is slowly corrupting Firefox with crap. Recent update broke my a small change I make to hide my tab bar using a userChrome.css file. They claimed that they retained support for the file by allowing folks still using it to enable set a flag in about:config but even after doing so, it was still busted. Turns out I had to change this line:
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
to this line
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xhtml");
Would have been nice to document that somewhere along with this change, no?