I like using the 1Password browser, so it would be nice if Stack Overflow for iOS had a setting specifying what browser to use. Right now it opens Chrome.
edit: 1Password does has a published URL scheme already: ophttp:// or ophttps://
Scroll down to "Open URLs externally, set 1Password as the default external browser"
edit2: I now see this in related posts. So this is a duplicate from 2014. Add 1Password extensions support to the SE iOS app