I use both Chrome and Firefox daily and I must say that over the years, from personal experience, Firefox has improved to the point of being about as fast and stable as Chrome. The downside is that Firefox lost most of its identity, the big one being XUL, which made for more powerful plugins and customization.

So yeah, Chrome and Firefox are more of less interchangeable now and the choice is essentially about how much you like Google, and specific details. Details include the presence or absence of a plugin you particularly like, support for video codecs and DRM (for streaming platforms), and specific features and bugs. Generally, I find Chrome better on the "specific details", one of it ( https://bugzilla.mozilla.org/show_bug.cgi?id=791429 ) actually was the trigger that made me switch to Chrome some years ago.

About extensions, I think all the extensions I use are available on both platforms or have equivalents. Now using

- uBlock Origin (of course)

- SponsorBlock for YouTube (autoskips sponsors in YouTube videos, user-contributed)

- Behind the overlay (remove most overlays, have many equivalents)

- URL to QR code (shows the current URL as a QR code, so you can scan it to open it on your phone, have many equivalents too)