I don't think Mozilla should be holding back functionality to avoid breaking extensions.
I respectfully disagree. Extensions are the USP for Firefox, and IMHO breaking compatibility should be considered a serious issue and not something to be done lightly. (See also: all the hate when they switched to doing six-weekly updates and it kept disabling extensions every time for months afterwards.)
In any case, there was no pressing need to remove the add-on/status bar. Arbitrary rearrangement of UIs is generally bad for usability. Ditto for major things like moving tabs (for anyone who isn't using an enhanced tab plug-in anyway) and the burger menu (which is now a tiny area right underneath the close window button, and appears to be completely inaccessible by keyboard).
I respectfully disagree. Extensions are the USP for Firefox, and IMHO breaking compatibility should be considered a serious issue and not something to be done lightly. (See also: all the hate when they switched to doing six-weekly updates and it kept disabling extensions every time for months afterwards.)
In any case, there was no pressing need to remove the add-on/status bar. Arbitrary rearrangement of UIs is generally bad for usability. Ditto for major things like moving tabs (for anyone who isn't using an enhanced tab plug-in anyway) and the burger menu (which is now a tiny area right underneath the close window button, and appears to be completely inaccessible by keyboard).