I can't answer your question, but I can offer a nice alternative in the form of extension, aptly named "Open in Reader View", works a treat! https://addons.moz

I can't answer your question, but I can offer a nice alternative in the form of extension, aptly named "Open in Reader View", works a treat! https://addons.mozilla.org/es/firefox/addon/reader-view/ https://addons.mozilla.org/es/firefox/addon/reader-view/ https://add0n.com/reader-view.html https://add0n.com/reader-view.html