I'm the author of "Runet Censorship Bypass".
We help Russians to circumvent state censorship while with some
tricks the extension may also be used to bypass private discrimination or sanctions-based censorship.
We received no notifications about this restriction.
Waiting for the official statement or just any comment from Mozilla.
I've actually found a workaround in the extensions API -- bypassing the script via `data` field instead of an url doesn't have 1MB restriction. The reason we compress the script is that it is used not only inside this extension but also in settings of other browsers/OSes (e.g. Internet Explorer, Windows system settings, chromium CLI flag `--proxy-pac-url`).
The PAC-script being minified in our case is generated outside of the extension to make the extension less resource-consuming. PAC-script is regenerated and updated several times per day. However we may release sources for the generator, actually the old version of it was published in 2018 at [1].
I believe this regime won't miss a chance to pwn the Russians for their own money, so they will try to parasite on a patriotic proprietary system pushed by taxes or laws.
We received no notifications about this restriction. Waiting for the official statement or just any comment from Mozilla.