There is something like that in Firefox. In the URL bar, to the right, a "paper hamburger" shows up that presents a Readability-like experience. The Mode is pre

There is something like that in Firefox. In the URL bar, to the right, a "paper hamburger" shows up that presents a Readability-like experience. The Mode is preserved during refresh, so you can often refresh a Javascript popup out of existence. It is occasionally intermittent, however.