That's why I don't use any KeePass extensions. I just don't trust browser enough to be able to get any of my passwords.
I'm thinking about writing my own extension which will communicate with KeePass in a way that suits me (basically: when I'm pressing button in browser, it'll popup KeePass window with search field filled with server domain. Then I can either auto-type password from KeePass or copy it to clipboard, either way I'm only using KeePass and browser extension have no way to get any information.
I'd absolutely use KeePass for a long term storage password vault (with appropriately obscure reminders so I could recall the password), but the ecosystem of many unofficial free implementations for integration into browsers, phones (IIRC), etc. makes me twitch.
The real threat is that someone takes control of the bitwarden browser extension and pushes a malicious update.