Disable cross domain web security in Firefox

Question

In Firefox, how do I do the equivalent of --disable-web-security in Chrome. This has been posted a lot, but never a true answer. Most are links to add-ons (some

Answer 1

Best Firefox Addon to disable CORS as of September 2016: https://github.com/fredericlb/Force-CORS/releases

You can even configure it by Referrers (Website).