hi, thanks, a big reason for Mozilla might/should be, because it is open-source? And we do this since 2012 for 400000 users in chrome, etc. Please consider, contrary to the comment, with 4 stars you are actually shrinking (down-voting) this project. (If you found any bugs: https://github.com/code-charity/youtube/issues?q=label%3Abug+sort%3Acomments-desc+is%3Aopen )