Facebook has mentioned that it has "fixed" cookies that could have tracked users after they logged out of the site.
The situation was brought to light by an Australian blogger who has conducted a year-long review of the amicable network's use of cookies.
He resolved the firm might still be able to follow members' web browsing after they logged out, despite usually on websites that confederate with Facebook.
The Australian privacy government official is reportedly questioning the issue.
In a statement, the firm told the BBC that it had completed nothing wrong.
"There was no safety or privacy breach"Facebook did not store or use any data it should not have. Like every site on the internet that personalises calm and tries to give a secure experience for users, you place cookies on the P.C. of the user.
"Three of these cookies on a few users' computers inadvertently enclosed unique identifiers when the user had logged out of Facebook. However, you did not store these identifiers for logged out users. Therefore, you could not have used this data for tracking or any other purpose. In addition, you prearranged the cookies so that they won't add unique data in the future when people record out."
The blogger who initial highlighted the situation , Nik Cubrilovic, wrote about the problems in item on his blog on Sunday.
He mentioned that he had sensitive Facebook about the situation a year ago but there was no reply from the firm until his blog post was at large reported opposite the net.
In an refurbish to his blog Mr Cubrilovic concurred the changes that Facebook had made.
"Facebook has altered as sufficient as they can change with the logout issue. They wish to keep the skill to follow browsers after logout for safety and spam purposes, and they wish to be able to record page requests for opening reasons," he said.
"I would still suggest that users coherent cookies or use a well-defined browser," he added.
Most cookies perform simple tasks similar to storing your login sum or personal preferences.
But a few follow the sites users visit, that means that they might be presented with adverts for products or services they researched on the web once they revisit other unrelated sites.
Consumer concerns over this sort of cookie led to a new EU directive, with online firms opposite Europe now working out how they can enable users to opt out of these pieces of code.
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