I-Firefox Community Forum

I am getting the following error message when using Firefox. The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem. I cannot see my bookmarks or add new ones. I followed the directions in articles about this problem and they did not. help. I decided to uninstall Firefox and l re-installed it from scratch and i still get the same error message.

Just as the summary says, Used to have an icon that I put under the "hamburger" menu on the bookmarks toolbar that opened the bookmarks menu. Can't remember how I got it there. Can someone help me get it back.

First, I am technologically illiterate, so my terminology will be imperfect. Until today, there was a second line in my Google browser that listed my favorite sites I visited daily. It was just below the Google Tab line (the very top line). That line is now gone and now I have to look up the web addresses in my bookmark thing off to the right. How can I get that favorite sites line thingy back?