If you're on iOS it would make sense since Apple is only allowing it's own webkit as browser engine, forcing chromium and firefox to be disfigured versions of what they are on other systems.
When I was working more frontend (~1,5 years ago) no browser would cause more work and trouble for us than Safari on iOS (we didn't have to support IE9 and lower).
When I was working more frontend (~1,5 years ago) no browser would cause more work and trouble for us than Safari on iOS (we didn't have to support IE9 and lower).