I recently gave up on firefox after trying for years to use it for my more sensitive browsing (email, bank, investments, etc.) where I could not run javascript

I recently gave up on firefox after trying for years to use it for my more sensitive browsing (email, bank, investments, etc.) where I could not run javascript blockers. 3 big problems (and many minor little things that i hit every day but haven't bothered to record) - composing email in gmail is horrible. unexplained bursts of lag where it hangs for several seconds and may or may not lose anything I typed in that interval. This one is recent as of the past couple of months. - outlook email just not updating or refreshing until I restart the browser. - lagginess in most if not all input boxes (could be related to the first problem above). - every few updates it will lose all my containers and I have to make them from scratch. It may be something these sites are doing wrong, but I don't have the patience any more. Chrome works, Edgemium works, so I switched. still use firefox for facebook container, but that's about it.