Add-on Compatibility for Firefox 30

Firefox 30 will be released on June 10th. Here’s the list of changes that went into this version that can affect add-on compatibility. There is more information available in Firefox 30 for Developers, so you should read that too.




  • Implement plugin whitelist. This shouldn’t have an effect for extensions in general, but it’s worth pointing out. As it was announced a while ago, most plugins will require action from the user’s side in order to be activated, and developers have the option to request being added to the plugin whitelist. Major plugins like Adobe Flash are already whitelisted. If you use plugins as part of your add-on, we strongly recommend that you move to other alternatives as soon as possible.



These aren’t really new developer features, but they’re a couple of bug fixed that don’t break compatibility and you might find useful.

Please let me know in the comments if there’s anything missing or incorrect on these lists. If your add-on breaks on Firefox 30, I’d like to know.

The automatic compatibility validation and upgrade for add-ons on AMO will happen soon, so keep an eye on your email if you have an add-on listed on our site with its compatibility set to Firefox 29.

10 comments on “Add-on Compatibility for Firefox 30”

  1. Lori wrote on

    Recently I find that (most if not all) add-ons simply stop working every few days. I find I can (always) wake them up by “rebooting” the add-ons by going into add-ons manager and “disable” followed by “enable.”

    1. Jorge Villalobos wrote on

      How do they stop working? Which add-ons are having this problem?

  2. Kohei Yoshino wrote on

    Japanese translation is here:

    1. Jorge Villalobos wrote on


  3. Leah wrote on

    I cant sync or load my bookmarks or toobar into 29 or beta does anyone have a workaround?

  4. mirette wrote on

    since i updated and try to open face book ..the page opens but is blank only the top of the face book page but nothing else empty …so pls tell me what to do as i can’t access the activity on face book …i installed and uninstalled and pressed the compatibility did everything ..kindly help me asp …thankx

  5. Jim wrote on

    Now that I have FF v30.0, I no longer have Norton Toolbar or any other Norton add-ons. What happened & when will the Norton products be back? Thanks!

    1. Jorge Villalobos wrote on

      You should contact Norton about it. They generally provide updates for each new Firefox version, but sometimes they’re late and the add-on will be briefly disabled because of it.

  6. TWM wrote on

    Firefox 30 will not support Thunderbird’s contact list side-bar add-on. Too bad as I may got back to my previous program.

    1. Jorge Villalobos wrote on

      Which add-on are you referring to?