Facebook has issued a pair of advisories aimed at helping users keep their account information safe.
The company, in separate notices, warned users about adware scams and advised against handing password information to current and perspective employers.
The statement follows a public outcry over reports that companies have been asking employees to hand over login credentials in order to scan their profiles.
While social networks have long been a resource used by companies to screen employees and new hires, the demand that users turn over their passwords has drawn attention from government officials and has been condemned by Facebook as "distressing."
"This practice undermines the privacy expectations and the security of both the user and the user’s friends," said Facebook chief privacy officer Erin Egan.
"It also potentially exposes the employer who seeks this access to unanticipated legal liability."
Facebook outlined procedures users can take to remove the unwanted browser plug-ins which have been blamed for posting third-party advertisements on the site.
Malware and adware scams have become an increasingly common problem on Facebook in recent years.
While some criminals have sought to harvest user information by traditional phishing or social engineering means, more enterprising scammers have constructed elaborate operations which exploit loopholes in the Facebook 'like,' wall and news feed services to spread spam messages and lure users to outside attack pages and advertising affiliate sites.