Since the beginning, web browsers have sent a description of themselves with every page: the User-Agent. For nearly as long web devs have been begged to not use the UA to change stuff per browser, and for all that time devs did it anyway #stuartwriting 1/4
However, the user agent is now mostly frozen in all modern browsers. You can still, normally, get a version number, and which browser you're in, but that's basically all. This protects people's privacy, because it's none of your business which browser I use. #stuartwriting 3/4
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