hi, it is two days my" XDM" addon extension has been disabled on FF browser. i searched whole the internet to find some solutions and i did some staff but nothing resolved the situation, XDM is a video,file downloader extension and after using a long time on FF two days ago got a red sign(due to security concern) is expired or not permitted, i have four other browsers which XDM works fine with them, there is no threat or security case going on with this extension and is not in the mozila banned addons list, i also found it is not available in mozila addons search list, i thought to delete it but unfortunately i missed it and it is gone from FF, everything else is fine just only this ,please tell me me what is going on, thanks.