Hello, I recently update to firefox 69 and now I have Firefox 70 and it's not usable at all. When I scroll Firefox blocks very often, it's the same for all websites. I need to click on the menu button and I see what I would have seen after scrolling. So if I want to scroll, I scroll, click menu. Then again I scroll, click menu button. After a few times, there is no more problem. it's like if the whole pages were in the cache at the end. And before there was to much information for the cpu. When I write it's the same: it's not smooth, when I write an url, firefox stops very often for a second. The url is written at the end, but it's not displayed immediately. Firefox don't crash, it blocks by scrolling and writing. When I click a tab or a button, it's responsive, no problem. I assume there is a problem, when it must refresh after writing or scrolling. I'm on linux, I checked that graphic acceleration is enabled, no plugins. I tried to delete the directory ".mozilla" several times, start firefox in safe mode, but nothing helped. Does somebody has an idea ?