User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0 Build ID: 20130215125822 Steps to reproduce: My sync is setup on multiple computers/tablets. On system A: * create a bunch of different tabs on one system * force a sync. On desktop system B: * Force a sync * Choose Firefox button -> History -> Tabs from other computers Firefox gives a nice list of other tabs (excellent). Open more than one them using either double-click or a middle button clicks Actual results: Clicking on another tab (with either double or middle button) will open a new tab at the end of the tab list and switch to it. In order to open another tab, I need to switch back to the "Tabs From Other Computers" page. Expected results: It should have opened that new tab, in the background, and left me to click more items.
In the new Synced Tabs sidebar, you can right-click a synced tab to open in the background, or right-click a device to open all its tabs. The old about:sync-tabs was removed in bug 1365273.