This extension is a different one from the 'Bypass Paywalls' one. Earlier, it was available in Firefox add on repos. Now it can be sideloaded. It is available for all major browsers.
Do not kill me, but I was paying for a magazine app, that only yesterday I realized was working flawlessly with this extension despite the site not being a very popular one.
Also, there is a browser based on Firefox, well it's engine Atleast, called 'Smart Cookie Web Preview' on Android that allows side loading of extensions. This allows you to use this extension on Android as well and basically bypass multiple Paywalls on the go.
Needs an elaborate by github standards workaround to work on android? I think I'll just continue to avoid sites whose paywalls archive.ph and 12foot can't defeat..
Well, one does need to sideload two apps, a browser and then the corresponding xpi file which will install the add on.
There was/is an alternate way on Firefox Nightly, I think to create a custom add on collection which will add it to mobile Firefox normally. But yes, you are correct, only a miniscule amount of people would care to run it on Android(though it is always nice to have a workaround).