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After Firefox went haywire every time I tried to upload a file or add an attachment to an email, I eventually found a way to "restore default settings". That fixed ONE problem but immediately caused several new ones: The "File Edit History etc" toolbar has disappeared. How do I get it back? The colours and identifying icons in the drop-down tab menu on the right have also disappeared. How do I get them back? Nowhere to recover them in Settings and no answers to the questions from Mozilla.  :-(

Some extensions, like Bitwarden or Notes, seem to have added their own shortcut icons between the settings cog and the other functions below the tabs, with seemingly no way to remove them? I already have them in my regular toolbar / extension overflow, which has much more space available, so I don't see the point of why there's duplicate ones in the sidebar taking away tab space?