[Userscript] Steam activation button

I apologize for my English =D

Um , care to explain to someone who has no clue how that thing works ... in a human language , how exactly does it activate the games ?

Cause the way i see it , its a random 3rd party that has access to the key i am trying to activate and my steam account which bothers me .

Спасибо)

Благодарю)

This is a solution in search of a problem.

Added (09.06.2017):

• Disabled for frames
• Added "My games" button

I use one called the Redeemer which already opens the redemption window whenever you copy a steam key from a key site.