Oh I see, that's true! Firefox bookmarks are a bit suboptimal in my experience too, for me it's because they don't have a description field so it's harder to search for them (unless you put the text in the title, but all these kludges are annoying)
I didn't see a line that suggests they're putting Qwant as default, only that they're making it available as a search provider, just as DuckDuckGo and others are.
They say:
Did you know you could choose the search engine of your choice right from your Firefox URL bar?
Me when I don't say inodes to refer to folders in iOS: