I use Chrome for work and Firefox for personal on my computers, and I'm always annoyed by Firefox's tab search after coming from Google Chrome, which has an AWESOME tab search - *just click once on the little little arrowhead at top right and start typing! :)*
The tab search was a game changer for me since I use so many of them (yes, too many). I discovered it on Chrome and was happy to find that Firefox has one too, but I always feel as though someone has tripped me up when I try to use Firefox's tab search. It's just not as user friendly, and I can't understand why.
Mozilla, get with the program!!