@ hsp: I am fine with tb 91.0.1.-2 too, but I can not install addons/extensions like tbsync ...
These are neither available in experimental as webext- (e. g. webext-tbsync ..., webext-dav4tbsync ...) nor installable from the mozilla addons-website directly (... not verified ...)?
I don't want to change the tb settings to allow it to install unverivied addons!
Any hints are very much appreciated
Thank you!