Closely related, but not a duplicate:
Warn users if they're submitting a bug with a beta browser
Quite frequently here on MSO, we have bug reports that must be clarified either in the comments or in an edit as to specifically which browser (os/version) the OP is using. Could it be of a benefit to the devs here if that information was auto-magically filled in to the end of a post when the user tagged a question bug?
Something like the following:
It may not be that big of an issue, but considering that this information is pretty easy to get with the help of a bit of JS (for example, a bit of google searching turned up ua-parser.js).
Obviously, the OP could still remove the browser information if they think it isn't relevant, but it just might make it easier to track down those pesky bugs going forward.