The page at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox clearly notes that all Firefox versions will contain "FxiOS" in their useragent.

This is not the case, as both Firefox and Firefox Focus, contain "FxiOS" nowhere in their useragent.

I'm developing a site that needs to know when a user is using a mobile browser or not. While official Firefox docs indicate this keyword, and I thought it would be perfect for detecting Firefox mobile, it's no where to be found when actually checking the useragent from an iOS device, when using Firefox.

Either change the docs (https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox) or fix the problem of it not showing in Firefox for iOS.

Developers need keywords that are unique to your mobile browsers. While your docs try to indicate that "FxiOS" is that unique term. It's no where to be found in your actual product.

I believe I had previously reported this problem, the problem was fixed for a few months, and now you've removed the "FxiOS" term again from your mobile useragents. Clearly, developers need some unique term or keyword from Mozilla to signify a visitor is using a mobile.

VIa : https://bugzilla.mozilla.org/show_bug.cgi?id=1638613

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