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How to find out if my add-ons are compatible with new firefox version before i install?


Is there a way to discover whether any of my current add-ons will be disabled/incompatible *Before* I upgrade to a newer version of Firefox?

Whenever I've updated Firefox, I haven't found out until After the new version is installed that my favorite 'must-have' add-on is incompatible and there is no viable/satisfactory alternative to it. The loss of Certain add-ons is, for me, a deal-breaker to upgrading. And it's a royal pain to downgrade to the previous version to retrieve my add-on.

I don't know if addiction to particular add-on(s) is common - I figure I can't be the only one . . . ? It would be So helpful if there were a database or list that shows which add-ons are/are not compatible with which versions of Firefox. Is there such a thing? If not, could one be created?

Thanks for your help!

Additional System Details

Installed Plug-ins

Somewhere in these pages I got the idea that this 'developer version' of FF could run with some of my 'incompatible' add-ons. I'd already lost some of them & haven't tried re-adding them. I didn't want to make any more changes or upgrades/downgrades until I could find a solution ...

Installed Plugins: (*And Many more extensions)

  • Shockwave Flash 11.7 r700
  • 5.1.20513.0
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.7
  • VLC media player Web Plugin 2.0.2
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Coupons, Inc. Coupon Printer Plugin


  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

More Information

SHASHANK ROY 21 solutions 119 answers


Add-ons listed in this gallery only work with Mozilla-based applications, such as Firefox, Firefox Mobile, SeaMonkey, and Thunderbird. However, not all add-ons work with each of those applications or every version of those applications. Each add-on specifies which applications and versions it works with, such as Firefox 2.0 - 3.6.*. For Firefox add-ons, the install buttons will indicate whether the add-on is compatible or not.

Report if this helped ! Thanks!

  • Top 10 Contributor
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3195 solutions 24389 answers

Firefox 9.0.1 is a real old version and is no longer supported - Firefox 24.0 is the current release version.

Open the Add-0ns manager tab and click on More for each extension that you have installed. Near the bottom of each "More" there should be a link that will take you to the download page where you can verify compatibility.

Or use this extension - https://addons.mozilla.org/en-US/firefox/addon/is-it-compatible/ - but I'm not sure how well it will work when you are so many versions 'behind the curve'.