Vezano za prozor u Firefox, trebas da pregledas njegova podesavanja. To nema veze sa malware-om.
A ako i dalje imas problema sa Firefox, resetuj ga na default.
https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems
I nisi imao Trojan horse downloader vec obican PUP software, obicno ih zovu adware:
Procitaj Pondus-ov post:
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EN: about Firefox, check his settings as this is not malware related. Or you may reset firefox settings back on there defaults:
You do not have Trojan horse downloader but regular bad PUP software, mainly known as adware. Read Pondus post for info.