This addon has gotten much better but in the last week or so it stopped working on addons.mozilla.org. I have all the necessary about:config changes made to enable it to work with this site, but it just...doesn't. Was working fine before.

Slows down sites to the point of being unusable. No read the manual section. Counterintuitive settings.

Almost Best Addon Everr!!

Thanks !

removed this add-on because I started getting Fake iPhone X for a $1 scam pop-ups in the Firefox browser.

It is difficult to create an algorythm that would give the optimum result to every page on the net I imagine. That is why respect for the undertaking, thanks for delivery. The addon would greatly benefit from an integrated user feedback feature that just reports which site is with which mode is not working to arrive at an overview.

works but too slow, 10 seconds to show a web page?!?!