I'd even say "adding a second vendor you need to trust". Yes, these days there seems to be a strong drive to just get a big package out of a single hand. Like having the browser closely tied to the OS. I don't like it. I prefer to choose the individual parts as i see fit. Keepass and some bit of custom sync, in this case. Now, in the same vein I expect MS & Google making it easy to support different browsers, I'd want Mozilla making it easy to integrate other password managers. I'd love to be corrected, but afaik the "password manager with extraordinarily well-integrated browser compatibility" doesn't offer any way or API to connect my keepass with it. Its only for Mozilla's own stuff. Not the open, user controlled system i'd love Firefox to be.
The Firefox Android Addon system is even worse... only a very short list of pre-approved extensions are available. With the escape hatch for devs requiring some stupid online-account. Sorry, but how is that different from an App store without side-loading?
Still recommend using Firefox, since it is the best we have. But yeah, i don't like the less and less open direction apparently chosen by Mozilla. And wonder if not being a good role model will hurt them down the line...
You need to install Firefox Nightly.