I do like the idea of anti-tracking features. (Sure hope it works with all the Google javascript and the NSA backdoor in the chipset.)
The hard-blocking of websites, not just a warning splash screen or just a very helpful bar icon, but absolutely no way to get past the block is what concerns me.
That is suppression.
I'm talking about this kind of stuff:
https://nakedsecurity.sophos.com/2017/08/22/fake-news-mozilla-joins-the-fight-to-stop-it-polluting-the-web/
"MITI will tackle fake news in several ways. It will work on products that target misinformation, both itself and with media organizations.
It will also research the spread and effect of fake news (expect some reports soon), and it will also host “creative interventions” that seek to highlight the spread of misinformation in interesting ways."