User Agent: Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0 Build ID: 20120724191344 Steps to reproduce: Since Firefox 14 and above, New tab page does not generate thumbnails on some sites(twitter, facebook, gmail, iclarified,...). I tried clean up profile, set by these instructions: http://support.mozilla.org/sl/questions/926742#answer-338815 , and fresh install Windows, problem still remains on the same sites.
It's the normal behavior, see bug 754608.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 6 years ago
Resolution: --- → INVALID
You need to log in before you can comment on or make changes to this bug.