Found it.
Sure. Here's the script. If you're interested in what it's storing or want to see a list of all TB tracking numbers it memorized, search for "RangerFox.TBManager" on Firefox's about:config page. They're all right there. I also had functionality to save your last log entry for that TB, but I commented it out in this release. I've never used it and I hate copy and paste logs with a passion.
I also recommend the one I made that finishes what Groundspeak started, displaying waymarks on the gc.com Google Map. I've been much more interested in Waymarking.com now that I can see them on the same map as the caches.