Thank for the great Tip. Rated 5 out of 5 stars
Just today the add-on YouTube Caption Downloader 2.3 disappeared from every uTube pages I've visited. Remembering the comment from Zattica on January 14, 2013, I checked my Firefox and discovered it has been updated automatically to v.18. I installed back version 15 and voila! I am able to use the beloved YouTube Caption Downloader again.This user has other reviews of this add-on.