The Nova UI is a serious usability regression — please give users a choice

I'll be blunt...: the new Nova interface is impractical, uncomfortable to use, and I find it genuinely hard to stomach. On a touchscreen, hitting the right tab has become a struggle. With a mouse it is no better — there are now dead grey zones where a click simply does nothing at all. This is not a matter of taste. This is a measurable usability regression, and it shipped to everyone by default. I am not alone in this. The same complaints are all over the forum, and my own students were furious when their terminals updated and everything suddenly turned round. These are people who use this browser for work every single day. For them the update brought nothing but lost time. We like Firefox. We want to keep using it. That is exactly why this is so infuriating: a browser we chose for its control and configurability is now imposing a design decision on us with no way out. If nothing changes, we will solve it ourselves — with a patch that suppresses update notifications and adds a "Manual update" option to the settings, so that people have a CHOICE and can keep working in the good old rectangular Firefox UI instead of having someone's "brilliant" idea forced on them. I would much rather you simply gave us that choice yourselves. Please restore a usable, compact, rectangular tab style as a supported option, and fix the dead click zones. Respectfully, A concerned user