Firefox 21.0 problem

Hello everyone. I have had this problem with firefox version 21.0 since I upgraded to it a couple of months ago. The problem is that in the history tab I can not select "Restore Previous Session", "Recently Closed Tabs" and "Recently Closed Windows".

I was able to select these options in the previous version and I have the same version of firefox on my other computer and this problem doesn't exist.

Assistance in solving this problem is much appreciated.

 

get the previous version?

 

Maybe I should just uninstall firefox all together and try and install it again, see if that fixes the problem?

 

there is a addon that can restore last closed tabs

 

The latest version of Firefox is 22.0 -- Maybe an update will help??

 

Thanks for all the help guys.

I couldn't find any addon and so I'll have to do a full uninstall and then install.