Facebook has tweaked its privacy settings again to ensure that its more than one billion members worldwide do not share anything publicly without meaning to do so.

In the latest attempt to improve its privacy record, the social networking firm has introduced pop-up warnings to double-check if users want to post content without any restrictions.

Facebook is also testing other changes, including: updating mobile and web designs with more prominent audience controls; a new default privacy setting for cover photos of private rather than public; a message clarifying who can see an image when friends re-share it; and more information on what “public” and “private” privacy options mean.

While keen to quell dissatisfaction over its privacy settings, Facebook is also taking care not to alienate users with too many inappropriate or confusing changes.