Rated 5 out of 5 stars

I have more suggestions of hidden commands for Firefox are: "browser.taskbar.previews.enable" = View thumbnails in Windows 7 superba, "browser.tabs.insertRelatedAfterCurrent" = New tabs at the end of the queue and "browser.tabs.closeButtons "= Settings button to close the tabs, where "0" add the close button on active tab only, "1" adds the close buttons on all tabs (default), "2" removes the close button, leaving only the middle mouse button for this task and "3" adds the close button at the end of the row of tabs.

This review is for a previous version of the add-on (1.11.2010012301).