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Every time I restart Firefox, I have to re-check the bookmarks toolbar and uncheck the add-on toolbar. After closing each session, the bookmarks disappear and the add-on reappears. This just started happening today.
When I brought up my Firefox browser this morning, my bookmarks were gone, and there was an add-on toolbar at the bottom of the screen. I figured out that I had to go to View>Toolbars>Bookmarks Toolbar, and check that to get my bookmarks back, then View>Toolbars>Add-on Bar, and uncheck that to get rid of the add-on bar. When I was finished web browsing, I closed Firefox, but when I brought it back up again later, I had to repeat the process, because the bookmarks were gone again, and the add-on bar was back again. This happens every time I close and restart Firefox. It's never happened before.
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When I click on that link, it says ERROR The requested URL could not be retrieved.