puNES also deserves more attention. It is highly accurate and supports obscure mappers and Famicom Disk System games (being the only emulator that plays the QD format): https://github.com/punesemu/puNES
He's not asking about the User-Agent string sent to websites.
He's asking about how the browser identifies itself to the Windows operating system. According to him, other forks say simply "Firefox," which makes it impossible to run them alongside the official Firefox release.
because Mozilla, the foundation, is hostile. it's a political money grab.
with telemetry they can justify whatever. they can go to the board and say "look people are clicking more on pocket, which we put prominently on the UI against everyone wishes, and they barely use bookmarks, which have critical bugs open for over 20years... who would have thought of this counterintuitive insight if it weren't for my genius persistence on trying and measuring new ideas uh? so are we good on the extra bonus to my close childhood friends?" ...see, it makes the pitch defensable, if you don't say the right parts out loud.
Or don't waste your time, given Mozilla management does whatever it or Google wants? Just like with Google, nobody works on anything that won't help get them promoted?
There are decade-old "everyone agrees this sucks, please fix it" bugs in bugzilla that are ignored because nobody in management or development cares. It's not sexy, can't go on their resume, it won't let them give presentations at conferences, or get them on people's podcasts, or tweeted about...
The most important part of profiles is being able to right-click on a link and open it in a different profile. I don't see that mentioned. I typically have multiple profiles open at once.
Edge has the best implementation where you can define sites opening in certain profiles. Pity ms ruined that browser - it is completely untrustworthy with it auto turning on options such as syncing.