Unfortunately, there is such kind of bug in SeoQuake version 2.7.5.
This situation occurs because we have redeveloped SeoQuake plugin in compliance with safety requirements of mozilla. At the moment we are trying to find ways of how to solve this problem. So we recommend our users to do the following: just turn off SeoBar and turn on Seotoolbar. In order to do it you need to make a right click on SeoQuake icon and there in context menu disable SeoBar and enable SeoToolbar.
Here you may see how to do it:http://www.seoquake.com/images/seobar.png
Seoquake team.
