Re: Just one question
It's called the user agent string. It tells you what version of browser your visitor is running, and often some extra data about their system. You don't need more than that. And you won't get more than that for the majority of your visitors who aren't using a browser you've compromised. Only Chrome sends those headers, and only to Google. You as an average web developer gain nothing at all from that feature.
Alternatively, use a local script to redirect to a simplified page if a feature doesn't work. Then, check how many times you're getting requests for that simplified page. When it drops to a level you're good with, delete the script and the page.
Biting the hand that feeds IT
