Ironically, I thought thats the worse place to store passwords in. I mean, a dedicated password manager sounds like it will have much more security than a "save password" feature in a browser.
You really should spend a bit of time reading https://www.grc.com/sn/sn-822.htm. It's a very long transcription of a security podcast. However, the part about password managers is short and near the end (maybe the last 25%). Some snippets...
"So the name Tavis Ormandy is one we've often mentioned on this podcast because Tavis is a prolific security researcher at Google." and he is quoted as having said:
"If you want to use an online password manager, I would recommend using the one already built into your browser. They provide the same functionality and can sidestep these fundamental problems with extensions. ... I use Chrome. But the other major browsers like Edge or Firefox are fine, too. They can isolate their trusted UI from websites. They don't break the sandbox security model. They have world-class security teams, and they couldn't be easier to use"
But, the host of the podcast added: "And by the way, I would like to point out it was only recently that Chrome's password manager did not expose your passwords in plaintext to anybody who had access to your computer." The podcast is from 2021, but it does highlight the fact that some password managers suck, whether they are in the browser or not.