By remaining constantly signed in on your social network account in the browser, you are also disclosing your [https://trackography.org/ browsing habits] on the Internet in general, outside of their service.
There are alternative social networking services that are built with privacy in mind, including [https://diasporafoundation.org/ Diaspora] and , [https://www.pidder.dePidder] and a recently launched [https://www.minds.com Minds] for Android and iOS.
*https://securityinabox.org/en/guide/social-networking