Bitwarden is wonderful and saves me so many headaches and gets five stars! - this review is for the browser addon only!
For some reason, they had to update the design... Fine, I liked the old one better but anyways...
But now, instead of just clicking on the entire tile, you have to click on "Fill" and to copy only eg. the password now requires two steps. This may sound nitpicky but if it's all the interaction you ever have with this plugin and that just got a lot more tedious it's not a good thing. I'd love to be able to revert here :/

EDIT June 2026: In the settings, use "compact mode" and "show quick copy actions". This immediately adresses this issue. Dark mode also works. I don't know if at the time I overlooked these or if these features got added later but I like them. Now, the UI is more or less as before but more rounded - and that's more an asthetic choice than an impact on usability.