I tag emails as "Work", "Important", "To do", etc., and in my inbox view I click on Tags and the right category to see all emails that are tagged "Work", for instance. While working with this group of emails, I must have clicked somewhere I shouldn't, because something that looked like stop signs (red circles with a white horizontal stripe) appeared in the outermost left column. I wasn't able to get rid of them and since they didn't look like they were doing anything wrong (they appeared on only some of the emails in the list), I left them there. But then, when removing the tag filter and then going back to it later, I discovered that many of the emails were missing. (I don't know for sure, but I am guessing the same as the ones that had the red circle). I couldn't fint the emails by searching for them either, but there were still in my inbox when I used another email client (on my iphone, for instance). After searching in Mozilla support and having tried various solutions, I finally managed to restore the emails by using the function "Restore folder". This is excellent, because they are important emails, but when I now filter my inbox for Tags, I only get a very short list of tagged emails. Most of the tags are gone from mye emails. (But not all of them!) I use this system instead of creating several subfolders, so this complicated my work a lot. Is there any way I can restore the tags? Thanks a million in advance.