A few days ago it was announced that next versions of Firefox will have huge improvements on performance and resource usage. This is great because browsers nowadays consume huge amounts of resources, making it harder for people with olders or weaker machines to use the computer without starting to pulling out their hair.
I’m not a huge fan of having lots of opens tabs, but I know many people that like to work this way, having dozens of them open. One question I always ask is how they find the tab they are looking for, when just the favicons are shown on the tabs.
It looks like Firefox makes it easy to handle this situation without any extra extension, just select the search bar in any tab (Ctrl+l) and then type “% <search query>” to search on the opens tabs.
I hope this is useful to you.