See these posts: * https://support.mozilla.com/en-US/questions/835982 * https://support.mozilla.com/en-US/questions/769105#answer-144769 Check and tell if its working.

I don't know anything about Android, but if you have the regular Firefox options and shortcuts.... If you mean for all sites you visit in a session, turn on Privacy Mode ("Ctrl+Shift+P"). You will not be able to bookmark sites in privacy mode. References: * Private Browsing | How to | Firefox Help<br>https://support.mozilla.com/kb/Private%20Browsing * Issues related to Private Browsing - MozillaZine Knowledge Base<br>http://kb.mozillazine.org/Issues_related_to_Private_Browsing