I mean, I just don't know how much people care about mobile browsers. I've never even considered switching away from safari on my phone? I don't really want any advanced features on a phone browser, I'm not running 20 tabs etc etc.

I could be the odd one out here - but whilst on desktop choice is fairly normal, web browser on a phone feels like a core OS tool. Realistically this is probably due to how shitty IE was, along with the enforced browser choice dialogs on Windows?

You have an iphone, so all your browsers are essentially Safari. The other features they may compete on are syncing to your desktop and stuff like that.

On android, Firefox Mobbile has uBlock Origin, whereas Browser, Chrome and any other one do not.

Anyone not using an ad blocker is out of their mind, especially on mobile; The simplest way to do that is Firefox Mobile + uBlock Origin.

How effective do you find uBlock Origin on mobile? I find that half the time elements don't get blocked. Disabling most JS using uMatrix seems to be more effective.

Very effective. Depends, of course, on the lists you select (I select most of the general and a few regional that are relevant to me) - and your tolerance to having to whitelist specific domains when things don't work. Mine is very high - and if you're a uMatrix user, it seems yours is too.

(I use uMatrix on the desktop, but only surf casually on mobile, so I find uBO sufficient).

Ok so a lot of that drop can be ascribed to a market rising in share of total browsers, and firefox having a lousy share of that market.

which I don't know what to do about that. I use an iphone and I see no benefit to getting FF on my phone, which I guess I would say is due to monopolistic behavior by Apple.