A year ago I wrote that most email newsletters are spam, file accordingly. Glad to see that someone agrees. Sometime between versions 0.9.10 and 0.9.30 of uBlock, the ad-blocking extension started blocking the tracking links commonly found in email newsletters (the ones I mentioned in previous post and many more are matched by the EasyPrivacy list included in uBlock). If you mistakenly subscribe to such a newsletter and click one of its links with a recent uBlock version installed, below is what you’ll see.
The Firefox Addons site has an old version of uBlock. Get it from the uBlock releases page instead.
Newsletter senders, including many from well-meaning organizations, please read my previous post and stop being jerky to your customers, fans, constituents, subscribers, patrons, or however you think of people receiving your newsletter — give them transparent, untracked links.
Or you could play cat and mouse with the uBlock and EasyPrivacy developers. This would be further evidence that your organization is a misallocation of resources.