The main downside to many mobile web sites is the desperate plea to use the app you have to dismiss every time. I feel sorry for the devs who build a great mobile version only to be forced to put a stupid "$SITE is better in the app" banner on it.
There’s also companies which seemed to break their Web experience specifically to drive people into the app. Credit Karma hasn’t worked on a browser on mobile or desktop for me in years. But the app version always works.
I guess it’s my fault for trying to use an Intuit product to begin with when I already know they’re evil.
This is a reason I also like the web is that after the page loads I can just do stuff instead of getting kicked out to have to update the app ... Or even having to re-log in ...
uBlock Origin Lite is available for Safari on mobile, though that's not exactly the same extension. Orion supports standard uBlock Origin on mobile, but then that's not a browser "of note."