Add-on Compatibility for Firefox 39

Firefox 39 will be released on June 30th. Here’s the list of changes that went into this version that can affect add-on compatibility. There is more information available in Firefox 39 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 39, I’d like to know.

The automatic compatibility validation and upgrade for add-ons on AMO will happen in the coming weeks, so keep an eye on your email if you have an add-on listed on our site with its compatibility set to Firefox 38.

5 responses

  1. Kohei Yoshino wrote on :

    Japanese translation:

  2. Michael Kaply wrote on :

    Wasn’t -remote actually put back for Firefox 39?

    1. Jorge Villalobos wrote on :

      According to the tracking flags and comment 92, 39 is the first version where -remote was removed. I haven’t tested myself, however, so let me know if the information on the bug is incorrect.

      1. Michael Kaply wrote on :

        Honestly that bug is incredibly confusing. The last comment seems to say it was backed out.

        But I see what you are saying. I have no idea.

  3. Igorr wrote on :

    Developers of add-ons changing the appearance of the Add-ons Manager should be aware far in advance about its visual re-design for Fx40:

    That bug should be marked as addon-compat, by the way.