MynaG's Bits n Bytes

26 Jan, 2013

Add-ons or extensions not working after Firefox update

Posted by: mynag In: Internet|Solutions & Tips

If you are still using Firefox as your internet browser, chances are that you will be automatically updated to the latest version or prompted to update to a newer version whenever it is available depending on your browser Update options. Many times you are recommended to upgrade to the newer version due security issues with your current browser  as well as other bug fixes the latest version would have them handled and fixed. However there is one drawback and there is a possibilities that one or more of the Firefox extension might not work with the latest version and that is if you are dependent on add-ons or extensions for working with your browser.

My advise is not to upgrade the browser as soon as there is a new version available until you are pretty sure that your extensions or add-ons can function or is compatible with the Firefox latest version. Check on for information if the add-ons or extension can work with latest version. But many times it would just say version blah blah and later. Not very helpful, isn’t it?

Sometimes we have to do things the hard way to find out. Let say we upgrade to the newest version of Firefox and some of your add-ons have stopped working after the update, what do we do?

If you do not want to wait for the next update of  the add-ons and the new Firefox update is not critical to you, then one way to make these add-ons  to work again is to revert back to the older version, so here’s how to install an older version of the Firefox browser until there are updates available compatible to the new Firefox version.

Steps to revert back to an older version of Firefox

  1. Close and uninstall Firefox.  At the Uninstall wizard, uncheck the “Remove my Firefox personal data and customizations” to keep your Firefox settings and installed Add-ons or extensions.
  2. Delete the Firefox installation folder which by default located at “C:\Program Files (x86)\Mozilla Firefox
  3. You will have to use another browser and visit the link or

    On the page, you will see a list of folders containing all the previous versions of Firefox. Select the old version that works for your add-ons by clicking on the folder that is named after the version you want to revert back to.
  4. You will then presented with another list of folders. Click on the folder named Win32 if you running Windows on your PC.
  5. On the next list of folders, click on the folder named en-US or en-GB for the English version.
  6. Click on Firefox Setup XXX.exe (where XXX is the version of Firefox you are installing) to run the installation or save it somewhere and installed it at a later time.
  7. After installation, run Firefox and this time, ensure that Firefox will not be updated automatically by going to Options. At the Options dialog box, go to the Advanced section and click on Update.
  8. Select “Never check for updates (not recommended: security risk)” and click OK

Advices from Mozilla

If you must install an old version of Firefox:

  • Make certain you keep the plugins up to date by periodically visiting the Mozilla PluginCheck page.
  • There are increasing numbers of Flash and PDF exploits. If you can’t keep your plugins updated, either disable the plugin or find an alternative such as using the Foxit reader to view the PDF file in a separate window rather than using the Adobe plugin to view it in the browser window.
  • Install either the NoScript add-on (recommended) or the YesScript add-on

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