Hi,

Since the last update the Zotero Connector add-on (a citation manager) has disappeared from Firefox. It says it's not "signed". I don't know what that means, but I really hope I can get the add-on back - I'm a student and I use it for absolutely everything. If I can't get the add-on, I need to start using another browser - I'd like to keep using Firefox. Can anyone suggest how to get it back? Can I go back to an old version of Firefox or something? I appreciate any help very much!