Cool free browser extension (IE and Firefox) that automatically checks websites you visit against its database, and warns you of potentially unsafe sites with a red button. The database has been compiled by automated and manual tests across "sites representing more than 95% of web traffic" looking for dubious practices such as excessive popups, spamming on emails submitted, spyware downloads, browser reconfiguration etc. Green/red/grey [untested] buttons magically appear next to each of the search results on Google and Yahoo too, so you get a heads-up before even visiting a site. Isn't the web a wonderous thing?
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