LinkThis tool will allow the user to specify a list of hosts to be blocked from the history tab, the recently closed tabs list, and the download manager (ctrl+j). HistoryBlock is a Firefox Add-on that works comparably to the newly created Chrome's Incognito mode, but without the necessity of switching modes while using the browser (or opening in new windows, etc).
Could come great to block SB-I and avoid the CSS leak attack!
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