How To Install Incompatible Addons In Firefox
Well, now that Firefox 3.5 is everywhere, addon developers should seriously consider upgrading their addons for compatibility. Just the day I installed the latest release, half of my SEO addons were not working!
Here is a work-around to get your addons working by disabling the addon compatibility check. This support is not present out of the box. You need to add 2 keys. The steps involved in doing this are :
- Type in about:config. Agree to anything it says.
- You get a list of configuration values. Right click on any one and select “New->Boolean”, the last option.

New Firefox Key
- Next,you get a window asking for a name for the key. Enter the name as “extensions.checkCompatibility”.
Set it’s value to false.
New Key
- Again create a new key, with the name “extensions.checkUpdateSecurity”.
Set it’s value to false as well. - Restart firefox.
This tweak might create some problems for your browser like, it disabled my address bar and the search bar. I easily got them back from View->Toolbars->Customize and then dragging and dropping the desired items.

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