Seamonkey Hijacked

[ka6uup]

I tried to log in to my Facebook page and immediately got a full screen page telling me my computer
security was compromised and I was to call Microsoft Security and a phone number.
I was able to open task manager and stop it but now every time I open Seamonkey the same thing happens.
My Security software ( Malware Bytes) says no threat
Has any one else ever run into this?
Chuck

[ka6uup]

After running a scan this seems to be gone but be advised any link in Google for Facebook seems to have this problem
Chuck

[Anonymosity]

More likely Facebook was hijacked.