Yes! FF PMs and designers seem to HATE user customization, add-ons and power user capabilities yet those are the main reasons I came to FF and why I still use it. While FF is still the best browser for me (barely), it's only achieved this by all the alternatives enshittifying and dumb-ifying their browsers even faster than FF. As it is I have to spend significant effort under the hood customizing UserChrome scripts just to maintain minimal usability. (...and thank the heavens for Lepton (https://github.com/black7375/Firefox-UI-Fix), a regularly maintained, well-curated, all-in-one collection of essential Firefox fixes (which can each be turned off individually via flags.)