Maintenance

[ibejoeb]

I can probably devote some time to this. It's been a while since I contributed to mainline, mostly because I have been running my own tailored branch, but I don't think too much has changed since then. Here's what I'd like to do:

1. Modernize it so that it can remain in CWS under MV3 for Chrome.
2. Create a differential build so that it continues to support Firefox following (1).

These are, necessarily, fairly substantial changes. Depending on the preferences of @etcet and users, that work could continue here, or I can fork with all due attribution and regard for the many years of utility we've all received. Open to everyone's thoughts.