David Baron's history sniffing fix has landed in the trunk repository (VCS nerds, click here for details)! This means you can grab one of our nightly builds and try out the fix for yourself -- but be warned, these nightlies aren't always stable, since they're rapidly changing.
While the fix isn't in the final version of Firefox yet, it should be in the next feature revision (3.7, or whatever major comes up next), and is shipping in alpha releases starting with 1.9.3a4. We're hoping to use the incubation time in nightlies, alphas, and probably a beta or two, to make sure the fix works and get feedback from some users. If you are skeptical about our fix or just want to test drive it, grab a nightly build and let me know what you think!