To add a little bit to my UI complaints: I recall that one of the original designs goals of Chrome was to reduce the chrome (ref: 2008 Chrome comic book). Over the years I’ve had a number of UI complaints with Chrome too and actually switched to Opera multiple times, but overall I think they did a good job at hiding the chrome and presenting what really matters. On the other hand, Firefox UI elements and cues stand out and intrude even after disabling everything I can find. Maybe some people prefer that for “usability”, but I personally prefer minimal UIs (hint: Apple user) and find them perfectly usable.