Firefox Android not on "open with..." list

[Andy_P]

If I select a URL in an email (by highlighting it), I get a pop-up window asking if I want to open it in the Google app or in the Dolphin browser (which I don't use but it is still installed).
Firefox is my default browser, how come it is not even listed? And how can I make it appear?

Thanks for any pointers.

[DanRaisch]

Moving to Mobile where the Android version of Firefox is supported.

[kbrosnan]

May require Firefox developers to register with this new Android feature.

[isaacschemm]

On my phone, I get a menu that looks like this. Do you see something similar? (It's ASUS so it might be different.)
https://imgur.com/a/nc9j5

[Andy_P]

Sorry for long delay replying, been away.
I have to report the problem has gone away, in fact I'm confused by my own description (where I mention having to highlight the url text) as in every test I've just done, I can't make urls NOT appear as 'clickable' links.
And when one of those is selected a pop-up screen similar to the one the previous poster showed appears, which DOES offer firefox as an option.

Sorry to waste people's time, ill re-post if it happens again.