LinkedIn scans your browser extensions through bruteforcing their IDs: https://browsergate.eu/
LinkedIn Is Illegally Searching Your Computer

Microsoft is running one of the largest corporate espionage operations in modern history. Every time any of LinkedIn’s one billion users visits linkedin.com, hidden code searches their computer for installed software, collects the results, and transmits them to LinkedIn’s servers and to third-party companies including an American-Israeli cybersecurity firm. The user is never asked. Never told. LinkedIn’s privacy policy does not mention it. Because LinkedIn knows each user’s real name, employer, and job title, it is not searching anonymous visitors. It is searching identified people at identified companies. Millions of companies. Every day. All over the world.

BrowserGate

@ulveon

Why are we still reporting extension IDs to sites by default? I should be able to choose which extensions are disclosed to the website. I should be able to lie to the website about which extensions I have.

@[email protected] I agree. It should be one of these "permission flags" like "website dot com wants to list your extensions" and I can either allow, deny, or report no extensions installed.