Cool, didn’t know that about Ecosia.

Qwant: looks like maybe they used to have a browser that might have been forked from Firefox, but it hasn’t been updated in a while - per the App Store listings, I think they now just have a lightweight search engine frontend.

Brave on iOS appears to have been forked from Firefox on iOS back in 2018-2019, which was news to me. (“Appears to” regards the date; it was definitely forked from Firefox).

the rest of the browser is derived from Firefox

This might be true for some, like Ecosia, but I’m guessing that Brave isn’t pulling changes from Firefox. It seems like they basically used the Firefox codebase as a starting point - and in 5 years of development, a lot can change.

I wasn’t saying that this is generally true for IOS browsers, just that a pretty large part of FOSS ones are

Gotcha, that makes more sense.

One more thing to point out is that your comment reads like they were based on Firefox and that Firefox didn’t use Webkit (but of course Firefox on iOS also uses Webkit).

more like Floorp

Meaning that they’re forks of Chromium on desktop in the same way Floorp is a fork of Firefox on desktop?