When the browser looks back

LinkedIn loads JavaScript that probes for installed browser extensions — thousands of them, including competitors’ sales tools, grammar checkers, and religious or political plugins. LinkedIn acknowledges this, but frames it as anti-scraping and abuse prevention. The question is not whether extension detection happens. It is how the results are used and stored? So the situation is not “hidden conspiracy script discovered”, it is “known technique used aggressively enough that it has triggered class actions”. ...

April 17, 2026 · 3 min