No, seriously. Can we just get all browser vendors cooperate and clean up the mess at the same time, so everyone wins?<p>User-Agent: Chromium&#x2F;47.0 (Windows 10)<p>User-Agent: Firefox&#x2F;43.0 (GNU&#x2F;Linux; X11)<p>User-Agent: Wget&#x2F;1.15.4 (GNU&#x2F;Linux)<p>etc.<p>Given that current UA strings are abysmal (and sent on every request), this would probably save a few kilobytes worth of headers (images, scripts, stylesheets), so would probably improve performance by some nanoseconds.<p>They managed to do this with SHA-1 deprecation and a lot of other stuff. So they could just announce that &quot;on February 1st, 2017 we all clean up the clusterfuck User-Agent headers are&quot;, bake in the timer and spread the word.