- Firefox (but fixed with settings that are hidden from the user for some reason)
- IceCat, Waterfox, Pale Moon, etc.
- Ungoogled Chromium, Iridium, Qutebrowser, etc.
Mozilla's actions (Cliqz spyware integration, ads in the browser, Google analytics in the browser, locked enabled telemetry, etc.) show that their "commitment" to user privacy is just marketing.
So...some minor derivatives of Firefox, plus some hacked-on versions of Chromium. What are you going to do if Firefox goes away?
edit: I feel like I should footnote this with the observation that Firefox is at the lowest marketshare it's ever been, and continues to shed users. It currently only exists so to be used as a defense in future antitrust actions against Google.
That being said, as much as I've been unimpressed with Mozilla's decisions over the last half-decade, I don't really see the issue with putting an ad on the new tab page, given that they claim it wasn't targeted and didn't use any user data.
(Source: https://utcc.utoronto.ca/~cks/space/blog/web/MozillaStillTru... )