This was one of the greatest add-ons ever! It's a complete shame that there is nothing else even remotely similar and that no one is making any effort to fix it. I re-installed Firefox 56 (thank you filehippo) and turned off auto-updating just to get this add-on back again. I don't even care that it's a "critically out of date" version of Firefox...screw it! And screw the brain-trusts at Firefox that thought it was a good idea to stop supporting Flashgot! You suck!