Facebook tested the private comment feature, set the right to read comments

Facebook is testing a new security feature that applies to personal comments. Accordingly users can comment on the post but only those who are allowed to see it can read it.

Clicking on the lock icon will open a selection of settings including: friends and post owners, only friends, post owners and commenters, everyone.

Currently this test is only available on some users' accounts. But it can be seen that the benefit of this feature is great when many people still want to have privacy, do not want others to see everything they like, comment on social networks.

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