I tried Ian's URL on my infuriatingly dense Android Firefox, and it works.
Every time I have to do something on the smartphone, I have to look up some polite equivalent of "how the hell do I do some otherwise simple task" like setting a bookmark. No, of course there is nothing as simple as "add bookmark" where you'd expect it. Oh, you tap the star. Oh, not that star, the other one. Where is the star? Oh, there. No, not there, here! I guess I must be becoming an old curmudgeon, but I do not get along well with symbols for everything. I want text, dammit!