Firefox is a web browser and not a search engine like ex: google.com is. Let me guess, it says you won some expensive current Android or iPhone phone or gift card worth around $1000+ US and all you have to do is submit personal information like name, address, phone#, and credit card info for the $1 to $2 shipping. 100% scam as this forum gets threads on variations like this every so often over several years now. Mozilla has given out some items before but they were in select cases and were say some Mozilla gear like t-shirts and such for certain occasions like mentioned in https://wiki.mozilla.org/GearStore