My URL editing routine on Android:
- copy the URL to clipboard
- open "Fast Notepad" app, paste
- edit, copy, paste
I agree, URL editing is infuriating especially with long URLs with massive tracking query strings (e.g. anything opened from Facebook). But not only. Sometimes I want to change subdomain of a long URL (e.g. from reddit to old.reddit) and it requires a lot of scrolling to the left.