“I doubt the file you download has anything to do with internet proxies... it sounds like you have a developer who has their own custom file format.” Reddit · r/learnprogramming · 4 years ago

: These are text files used by browsers to manage internet traffic via a proxy server.

: These typically represent one of two very different things:

: This is a proprietary archive format used to bundle and compress files. Reviews from users on platforms like Capterra and Google Play generally praise the efficiency of its compression compared to ZIP, though some experts recommend free alternatives like 7-Zip for better compatibility.