up until a few days ago firefox was running completely fine, but lately its been running ridiculously slow sometimes taking up to 30 seconds to load a page. at first i thought it was my internet but thats all fine. theres also a few other problems where videos are really choppy and if i have 2 or more tabs open and switch between them the pages go white and reload again and it take 2 clicks to shut a tab. ive tried refreshing firefox twice and it does seem to fix the tab problems and the load problems but the browser then feels really clunky and videos are still choppy. and as soon as i close firefox and re-open it it goes back to being ridiculously slow again. i would love to know if theres a way to fix these problems as its becoming quite unbearable to use. thankyou.