Firefox's new anti-tracking features best Chrome and Edge

You wouldn't think a quick visit to the website of left-leaning MSNBC would result in an encounter with the National Rifle Association (NRA). But last night it did for me.
I was testing the latest version of Mozilla's Firefox browser, which features enhanced anti-user-tracking protections. (You can find more details about the update here.) As I scrolled down the MSNBC.com page, I saw that part of it was obscured by a gray box. That's Firefox's new way to tell you that some content on a page wan