I've been staying with Firefox not for the performance (today Chrome loads Google sites like YouTube faster), but mainly for Tree Style Tab extension. I couldn't imagine opening more than a dozen of tabs without it.
I can't imagine having more than a dozen tabs open, period. You tab hoarders will never make sense to me...
Firefox/Sideberry is useful for mitigating that. I also have workflows set up for mass-exporting my tabs from Firefox to a text file and reorganizing them in plain-text and re-opening just the tabs I care about[0].
Bookmarking on any browser is cumbersome and leads to disorganization over time. Tree-style tabs helps make that organization at least a little bit easier.
The big change for me has been realizing that all my "tabs" are still there, in the form of my browser history, or if not, via Google search. If I can't find my way back to a website via my history or via searching the web, then I probably also wouldn't be able to find it among 1000 tabs. So why not close the tabs and be free of them?