Miserable with Firefox 57. Not only has it taken control of the entire menu/favorites bar, it has blacked out the very top of the screen so you can't easily see the File, Edit, etc., NOR what's on the other open tabs. You cannot see the new tab field, either. HATE it. I have used this program for years and donated to it, so I hope it will be fixed at some point.

Hate it for now. Uninstalling. Also, not sure if this is related to this issue or something else inherently wrong with FF 57, but now all my bookmarks saved folders will NOT open. So everything saved within the folder cannot be reached. Woe is me.