An absolutely essential extension to integrate KeepassXC into the browser. This works perfectly most of the time, and seems to improve with every release -- I need to do less and less to get it to work with the sites I use.

The only thing I don't like about it is that it could go a little further to explaining to new users what they need to do to setup integration; it's not apparent that one needs to add a open settings and add a connected database in order to start using.