If you're using "ublock origin" as your ad blocker, then it'd have to be your password manager or grammer checker plugins slowing you down. Either that, or you

If you're using "ublock origin" as your ad blocker, then it'd have to be your password manager or grammer checker plugins slowing you down. Either that, or you're keeping a page up that has a memory leak so it wouldn't matter which browser your using. Does it go back to it's old speed if you open a blank page then close all other tabs and wait 10 seconds?