Since we switched to the rapid release process, the mobile team has been using tracking-fennec to track bugs we care about for a particular release (so that tracking-fennec=7+ means the patch or feature either landed in Firefox 7 or we expect it to). Yesterday we added another possible value to that in just a plain plus (“+”).
The motivation for this change is that there is a set of bugs that we know we care about and want to keep “on the radar” but that we can’t say with any certainty will land in a given release. When we get more clarity on that we can change the tracking flag to reflect that new information.
Since we’re not tracking the bugs marked tracking-fennec=+ for a given release, the drivers won’t be as religious about finding assignees for them. So if you’re looking for something to work on, have a look at the queries listed under “Bugs to pick up” on this page. They are essentially open, tracked bugs and unassigned, open tracked bugs.