flashgot was my all time favorite download addon, but firefox new architecture killed it (for sure to much efforts to implement. i still was happy, cause this time was spend to noscript, an other project from the creator of flashgot).
then this video downloadhelper addon was heavily promoted on firefox addon website, even if it was just a dim light compared with its bright predecessor. i installed it cause for lack of alternatives and most of the time, it did its job, even if it had sometimes issues and wasnt as compfy as flashgot.
and now it demands money (30$/20€) to remove a watermark, that itself has encoded in the downloaded video.
the new art of blackmailing! time to move on..