Easiest way is to use packet sniffing. but they could be set-up to only send data at random intervals, which could be hours, days or weeks. so you’re best bet is go through the source code by extracting the extension file and look for any links, domains or mangled code which may be encoded with something malicious.
Indians push these self-aggrandizing lies everywhere on the internet, from reddit, youtube, to quora and facebook. And with their population propping up these posts you have to take everything with a bucket of salt.
The top post is saying people don’t pirate Windows there because it’s illegal, like what??? go to any piracy based forums, telegram channels, and groups, it’s full of them.