It seems that the magic system for detecting add-ons that won't work with the new version of Firefox has determined that tabgroupsmenu is one of these - the automatic updater for Firefox warns that it will be disabled. I'm not updating firefox for this very reason, at least for now.
It seems that the magic system for detecting add-ons that won't work with the new version of Firefox has determined that tabgroupsmenu is one of these - the automatic updater for Firefox warns that it will be disabled. I'm not updating firefox for this very reason, at least for now.