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automatically installed desktop shortcut on Windows 7 pro suddenly called Mottzilla. Have I been hacked?

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I am using Firefox 19, upgraded on 20 February. It appeared automatically to install a desktop shortcut, which I have just noticed is called MoTTzilla . The only Mottzilla I see on a quick scan is a gaming company.

Is this a hack? or virus? If I right click and open file it leads to Mozilla program files, but I'm not sure where to look to find something inappropriate.

I am using Firefox 19, upgraded on 20 February. It appeared automatically to install a desktop shortcut, which I have just noticed is called MoTTzilla . The only Mottzilla I see on a quick scan is a gaming company. Is this a hack? or virus? If I right click and open file it leads to Mozilla program files, but I'm not sure where to look to find something inappropriate.

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Please, check your add-ons, it may be caused because of one of them. Also it is possible that you have virus in your PC.