Respectfully, Comcast has an ATROCIOUS privacy record. Full stop. A quick search came up with [1] [2] [3].

Your employer actively and repeatedly abuses the privacy and trust of its customers. It also lobbies for damaging policies.

I do not trust Comcast. Firefox associating itself with Comcast makes me trust Firefox significantly less.

[1] https://oag.ca.gov/news/press-releases/attorney-general-kama...

[2] https://www.king5.com/article/news/local/comcast-fined-9-mil...

[3] https://consumerist.com/2016/04/01/comcast-says-fcc-privacy-...