Please share your thoughts on mobile Firefox as that’s my primary browser. My issues are
lack of tab grouping
tabs are too easy to swipe away
you can swipe tabs away when in OS overview mode
no mechanism to close duplicate tabs
lack of Material Design 3 (Material You)
inability to disable password management
everything about Places, it feels like history is always the lowest priority and the reality is that I want history as the top priority, synchronized tabs second and search engine suggestions last