User Agent: Mozilla/5.0 (X11; Linux i686; rv:67.0) Gecko/20100101 Firefox/67.0
Steps to reproduce:
I have an RSS reader with an option to view article bodies in reader mode.
It builds an <a> with href of "about:reader?url=...". Clicking on this element does
nothing. Right click and "open in new tab" creates a new tab (_blank is on the
element) but no content. The base URL is on the location bar, and if you click
up there and hit enter, the target URL is now rendered in reader mode.
No action, or blank until click on URL--then get reader mode content. On Fennec
it won't even let you open link in new tab.
I understand the hesitation of Firefox to let web pages reach out to the about:
namespace. OTOH, rendering a page in reader mode is, of itself, a benign action.
I suggest either the about:reader space be granted a distinct security policy, or that
some other URL scheme be adopted to access a reader view of a URL. reader:URL,