@IzzyOnDroid @downey Just a heads-up; You can easily fake your user agent via extensions (to the point of pressing a button, followed by the browser).
There isn't a whole lot of things that aren't done easier in-browser, compared to using multiple ones nowadays.
@christopherklay you can and I can, and I bet @downey can as well. But many users are simply lost at that point. Furthermore, if faking the agent does the trick, the blocker was entirely unnecessary.
And as for "using multiple ones": I do that for multiple reasons. One of them is "compartments" (yes I know "container tabs", but what's in different browsers is an entirely different beast).