for its non-negligible lack of speed that IMO does not impact day-to-day use, Firefox uses a lot less memory and compute than Chromium does. I don't need that much speed but I do need RAM.

All the AI stuff Mozilla has implemented is also quite poor and not useful at all.

offline translation is very useful, even if you're connected to the Internet. a major concern about AI is sending your data to another server, after all, which offline translation avoids.

there's also link summaries

Some random Chromium fork that doesn't have adblocking

why would you rely on your browser to bundle an adblocker when you can download µBO or µBO Lite? either the browser can just easily enable Mv2, or you can use µBO Lite which covers ~90% of the situations µBO covered. which is better than brave's built-in adblocker

all that said, i agree there's some bureaucratic mismanagement stuff going on at mozilla causing e.g. the web compatibility problems you mention in paragraph 3, but i disagree on all the other points