Hi david,
maybe, if I find time (that doesn't improve the quality of the code though. ;-)
Until then everybody feel free to unpack the *.xpi of the Addon. It contains a license.txt (CC by 3.0) and all source code needed. (The archive also contains a *.jar in the chrome subdir, that can also be "unzipped".) You'll find code in Javascript and XUL/XML (for UI).
So basically, the addon is already "open" and "open source". Anybody feel free to use that. I would be just happy if you credit me somewhere in case you actually can reuse parts of it.
Michael