Officially support ESR

[jtagcat]

#54 (comment)

I'll do a PR myself, just hang on ..a few minutes, a few days? Every issue I close, 3 new rise.

[numirias]

Good to know! But is this something people actually need? The large version gap between latest and ESR means that I need to be more careful with updating and throwing out legacy code.

[jtagcat]

It would be nice to at least mention it. Installing add-ons on ESR is probably done by people who know their stuff.

If I remember correctly, it is possible to specify on extension versions, what versions of the browser it is compatible with.

I don't know if the browser goes 'this extension version needs a newer browser, let's wait on updating it/get an older version' (if paxmod even has auto-updates) or do we need to point out the latest version for ESR on the readme regularly.

Testing / absorbing docs would will need to be done. I think I have the knowledge to do so ..if I get around to doing it.