Ist diese Website wirklich von Firefox?
It's a scam; please ignore !
Like posted above, Mozilla never offers a reward and would never ask you to enter a credit card number or other personal data in a survey or otherwise. Don't let the presence of the Firefox logo mislead you.
See also "Help -> Report Deceptive Site ..."
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If you get a pop-up message asking to update Firefox or plugins or scanning for malware or offering a reward then such a message is likely a scam and you should NEVER respond to such an alert to avoid getting infected with malware.
- only update Firefox via "Help -> About" or by downloading and installing Firefox from the Mozilla and never via a pop-up or link on a web page.
- plugins should only be updated via the plugin itself or by visiting the home page of the plugin.