Signing a Self-Hosted Auto-Updating Firefox Extension under the New Regime
I run a self-hosted auto-updating Firefox add-on being used by several million people. I am informed that I will need to "sign" it soon or it will quit working. (Deadlines are unclear; it seems like it may be as soon as June 30th.) I am looking for exact instructions as to how to make this happen.
I am not finding these instructions, so I am doing my best to puzzle things out.
Googling for things like "how to sign a firefox add-on" get me a lot of false leads. Mozilla should take down or at least modify these pages with current information: