User Agent: Mozilla/5.0 (Windows NT 6.1; rv:21.0) Gecko/20100101 Firefox/21.0 (Beta/Release) Build ID: 20130511120803 Steps to reproduce: I installed Firefox 21, made it my default browser, and began surfing to favorite websites. I expected to see these websites in the jump list on the taskbar icon (Operating System Win 7 Ultimate). Actual results: I right-clicked on the taskbar icon, but no jump list or Tasks list (Open New Tab, Open New Window, and New Private Window) appeared. Expected results: There should have been a Tasks list, with the three tasks I mentioned above, plus a list of my "Frequent" websites that I could select and pin to the list. There was no "Frequent" websites list.

Hello, this behaviour has already been noticed and it's being discussed in bug 870529. Please add your comments and/or follow the discussion there. Thank you for your report!