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5mffxtbr@MyFunCards_5m.com is a browser extension unique ID.
A browser extension is a computer program that extends the functionality of a web browser in some way.
We suggest you to remove 5mffxtbr@MyFunCards_5m.com extension from your browser as soon as possible.
Also, you should delete files and registry keys, created by 5mffxtbr@MyFunCards_5m.com.
5mffxtbr@MyFunCards_5m.com is related to: Adware.