To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseDeveloper reply by Desktopd Collaboration
Rated 4 out of 5 stars
lately the html5 video player controlls are gone until you once disable the addon , play a video and then enable it again.
This user has a previous review of this add-on.You might want to look at https://discourse.mozilla-community.org/t/how-to-determine-the-mime-type-of-the-loading-document-in-a-content-policy/9917?u=desktopd
To create your own collections, you must have a Mozilla Add-ons account.