As of today, every other article page load on The Washington Post's site in Firefox triggers a pop-over banner from the Post saying I'm blocking their ads. This happens even when I have all ad-blocking turned off in Firefox. Example page with the problem: https://www.washingtonpost.com/opinions/2019/05/23/americans-dont-want-congress-impeach-democrats-arent-listening/?hpid=hp_no-name_opinion-card-b%3Ahomepage%2Fstory-ans The ad-block warning may not appear the first time the page loads, but if I press F5 to reload the page, the warning usually appears when the page reloads. Firefox 67.0 is not showing a content blocking shield icon for the page. I have tried: - Setting Firefox's Content Blocking to Custom and unchecking all blocking categories - Turning off Firefox's pop-up blocking - Turning off Firefox's auto-playing videos with sound blocking - Turning off ad-blocking add-ons - Disabling all add-ons (not shown in screenshot) - Telling Firefox to forget about the site - Telling Firefox to clear all cookies and data for the site - Clearing all Firefox cookies and data - Restarting the browser - Adding the site to Firefox's cookie handling exception list as always "Allow" However, the Post's ad-blocking warning still comes up about 50% of the time. I've read Post articles in the past in Firefox--with ad blocks enabled, even--without ever encountering this problem; this is the first time I've ever encountered this ad-block warning of theirs.