How to Make Old Addons Work with Firefox?

Mozilla has recently released its new version browser named as FIrefox 4 which is available for download from the official Firefox website. There are many encouraging features and enhancements. Also the visual appeal has been changed to provide much better UI. Although, everything looks fine, one disadvantage of Firefox 4 is that the old add-ons that worked in Firefox 3 will not work in the latest version as they're made for Firefox 3x Version.

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How to Make Old Add-Ons work with new Firefox?

Option1: Install the Compatibility Reporter add-on which will make the old addons work properly in Firefox 4.
Option2: If not interested to install an extra add-on, then simply follow the below steps to avoid Compatibility Test.

1. Goto your address bar in Firefox 4 and type about:config


2. A new window will be opened. Now right click anywhere on it and select New -> Boolean.
   


3. A new pop up box will appear where you need to type extensions.checkCompatibility.4.0
   


4. And in the next window, set the value to false.
   
   

That's it! Now all your old addons will work on Firefox 4.0

Note: You can use the same work around in the upcoming Firefox versions to make the old plugins compatible with the new version. In the step 3, simply change "extensions.checkCompatibility.4.0" to the version you like.