Add-on Compatibility for Firefox 14

Firefox 14 has been in beta for a while now, so this blog post is a bit overdue. Here’s an almost comprehensive list of the changes that went into Firefox 14 that can affect add-on compatibility. There is more information available in Firefox 14 for Developers, so you should read that too.




Please let me know in the comments if there’s anything missing or incorrect on these lists. If your add-on breaks on Firefox 14, I’d like to know.

We will be doing an automatic compatibility validation and upgrading for add-ons on AMO that are compatible with Firefox 13, sometime in the next 2 weeks.

2 comments on “Add-on Compatibility for Firefox 14”

  1. Kevinsh wrote on

    I’m developer and occasional user of the add-on Firebug. I had a strange thing happen when I tried to install Firebug to my home system. I opened the Add-ons page and typed “Firebug” and it returned no search results. So I opened a new tab and went to and searched there – no addon to be found. So I type it into the Google search engine box and open a direct link straight to the addon and find it does indeed exist. Now when I go back to the mozilla addon’s webpage it will sometime find it and sometimes not if I try repeatedly. If I use the internal Firefox addon search it still won’t find it. I don’t have much in the way of addons other than McAfee SiteAdvisor 3.4.0 and NoScript 2.4.6, but it does seem like something within my browser is actively trying to block access to Firebug. I’m now tempted to uninstall FireFox completely and reinstall it fresh. Anyone else seeing this problem?

    1. Jack wrote on

      Try disabling “No Script” and see if that stops this strange activity. I had all sorts of strange things going on with No script. Stuff that should have had nothing to do with that ad on. I firmly believed in No script.
      It was only when I got desperate, and started eliminating one dd on at a time that I came across this culprit. I’m running Win 7-64 bit. This strange activity did not happen with the old XP.
      Hope this helps.