1. Firefox's ctrl-f search doesn't highlight all instances of a found item on the right hand side. It sounds petty, but its a gigantic timesaver for looking through research documents
2. Firefox's tab crash recovery isn't as solid. I use chrome with fully persistent tabs, and its a gigantic pain if I can't re-open them
If I could find a way to fix these I'd swap in a heartbeat
I haven't used this, as I didn't know it was a feature I needed until you mentioned it.
- https://addons.mozilla.org/en-US/firefox/addon/find-in-page-...
Tab Session Manager allows you to dump tabs to groups for restoration later, with auto-save at regular intervals. Works quite well!
- https://addons.mozilla.org/en-US/firefox/addon/tab-session-m...
I normally have 5-50 tabs open (so perhaps on the lower end), but I can't recall the last time I crashed a tab in the last 3 years. I also use persistent/pinned tabs and never noticed issues.