Today I have noticed that the famous Firefox SEO plugin SeoQuake has stopped working on google.com although it is working with the local version of google like google.co.in
The new google.com page has got some changes that caused this plugin stopped. Now its back to normal with the latest update.
Yes there is an Update: Just update the plugin and it will again start functioning.
If you feel that still its not working then alternatively you can use the another famous SEO tool “SEO for firefox”.
This tool function very similar to SeoQuake. Best of luck to all webmasters.