Apparently saurik and I are the only ones confused!

I found it very jarring to read that Firefox 6 isn't out yet, but the thread talks as if Firefox 8 is actually out, or very close to being released. In my mind I'm envisioning a weird, staggered, neither increasing nor decreasing of version number release cycle.

I think you're coming from a different angle where all of this is very familiar for you, so you can't relate to the confusion some of us other readers have had to deal with.

The "conversation" of this thread started with someone commenting on the fact, seemingly surprised and even bothered, that we are already talking about Firefox 8 when seemingly Firefox 6 and 7 went by so quickly we didn't notice it happening. In this context, it is incredibly relevant that Firefox 6 and 7 are still being described in the future tense, as that would imply that they haven't actually been released yet.

Versions 6 and 7 haven't been released yet, but the feature sets are locked in due to the faster major version release cycle. The recently discovered memory fragmentation issues (https://bugzilla.mozilla.org/show_bug.cgi?id=666058) and more efficient garbage collection are being addressed in version 8.

The bug you linked to will be fixed in version 7, not 8.