I replied this in another comment, but here is a look into an opensource version...

gzer0 on Feb 14, 2022 | parent | context | favorite | on: On the Future of 12ft

I replied this in another comment, but here is a look into an opensource version that you can compile. It will give you a good idea of how it works behind the scenes [1].

[1] https://github.com/iamadamdev/bypass-paywalls-chrome

makeworld on Feb 14, 2022 [–]

Also: https://gitlab.com/magnolia1234/bypass-paywalls-chrome-clean