Add-on Compatibility for Firefox 37

Firefox 37 will be released on March 31st. Here’s the list of changes that went into this version that can affect add-on compatibility. There is more information available in Firefox 37 for Developers, so you should also give it a look.




Please let me know in the comments if there’s anything missing or incorrect on these lists. If your add-on breaks on Firefox 37, I’d like to know.

The automatic compatibility validation and upgrade for add-ons on AMO will probably happen in mid-March, so keep an eye on your email if you have an add-on listed on our site with its compatibility set to Firefox 36.

6 responses

  1. Kohei Yoshino wrote on :

    Posted Japanese translation:

    1. Jorge Villalobos wrote on :


  2. kevin007 wrote on :

    hello i am downloading youtube downloader from mozilla to download educational videos but everytym i am facing a problem after restarting my computer…and the addon gets disappeared can some one suggest a solution to this problem ??

    when i want to download a video i have to again download the addon everytym its creating a problem to me please help

  3. Dwan wrote on :

    My Ant video player won’t even open since I update to FF 36. Anyone else having this issue?

    1. jus wrote on :

      i have the same problem too

  4. Thor wrote on :

    firefox 37 is breaking all the video download addons. I can’t use it anymore even to get files from creative commons shared lessons from youtube.

    There is more this seems to be related to the new html5 way to use video, because opera 27 is not anymore able to allow any download either.I try to capture the video using videolan, but that’s failing.
    I bet that soon there will be a lot of paid programs and services to do it.