Originally I switched to Chrome browser because it was the only one that I could use for casting to my original chromecast connecting to the TV. Now I don't even have a chromecast but I am staying with it because I am used to it. Also the bookmarks sync with the chrome browser on my Android phone. I don't remember my chrome browser ever crash or slow down maybe because of the extensions I use.

Ad*Block Plus: Block pretty much all the ads. It is amazing how much faster the browser is when you don't have 8 to 10 ads flashing on your screen.
The Great Suspender: Put all the inactive tabs to sleep. It frees up so much memory. It was one of the worst thing about Chrome.. the memory usage.