TL;DR: LinkedIn scans your browser for extensions & pillages that data for profit. This is apparently illegal in some jurisdictions
I do appreciate their presentation & delivery. This is a very readable, yet detailed report. But the language is admittedly pretty biased at points, making emotionally-charged arguments instead of fact-based reporting. And the site is ultimately just trying to separate readers from their money
I do already operate under the assumption that every website can/does scan my browser for installed extensions in this manner. PG only recommends adblocking extensions & suggests reducing/eliminating extension usage