A malicious Firefox extension called FirestarterFox is being installed by some of the latest malware variants. This extension hijacks all search requests through Google, Yahoo and Microsoft Live search and redirects them through the Russian site thebestwebsearch.net. This is done with the intention of showing ads on the search results page which presumably make money for the creator of this piece of malware.
Luckily the extension can’t be silently installed since Firefox alerts users to all new extensions. So if you ever start Firefox and get the message that a new extension called FirestarterFox has been installed you will immediately know that you have malware on your system and should take steps to remove it or reformat your system.