Facebook adds 5 divs, 9 spans and 30 CSS classes to every post in the timeline

This example is likely not specifically targeting ad blockers, but ad scrapers for transparency: https://www.propublica.org/article/facebook-blocks-ad-transp...

> Our tool recognized ads by searching for that word. Last year, Facebook added invisible letters to the HTML code of the site. So, to a computer, the word registered as “SpSonSsoSredS.”

That article also links to this tweet in that paragraph.

> We have collected more than 100,000 political ads in this way. But Facebook’s latest update blocks tools like ours from clicking on the “Why Am I Seeing This” menu.

> The company added code that prevents clicks generated by computers — including browser extensions — on just that one button. Web browsers make a distinction between a click generated by the computer and one generated by your mouse. Clicks from your mouse are marked “isTrusted“ and those generated by computer code are not.