I am seriously starting to hate Firefox updates. I open my browser this morning and everything is GONE....all the sites I had pinned to the toolbar at the top, my bookmarks, etc. There is no sign of any tools or anything to FIX this. I looked on the Firefox website and the article was unhelpful about missing things after an update, and referred to a "bookmark button" that doesn't show up on my screen. Plus, there is this horribly irritating feature where the screen toggles back and forth from full screen to only showing the toolbar at the top when I hover over it. I HATE THIS. Is there a way to revert back to my previous version????