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Web dev: What browser is visiting the page?
User agent string:
A screenshot of a browser. The URL bar reads firefox://settings, a button on the URL bar is labelled Netscape, a popup from the button reads: "You're viewing a secure Opera page", and the web page title reads "Chrome settings".
Functionally useless. With the web standardized, we shouldn't need user agents anyway. It would be more beneficial to ask "do you support X, Y, and Z?"
Web UI for touch screens is a lot different than keyboard and mouse. I still switch to desktop most of the time because the mobile site will lack critical info, though. They "have" to streamline the experience for mobile, but I hate it when they fully remove features.