===Hooks to control access to createOffer/createAnswer===
With the removal of old-style add-ons in Firefox 57, the following information is no longer applicable. An equivalent WebExtensions API is under development, but not yet complete. See {{Bug|1281833}} for details. <s>Firefox 43 (uplifted to 42) supports hooks that allow an extension to allow or deny calls to createOffer and createAnswer -- {{Bug|1189060}}
<nowiki>
// Add-ons can override stock permission behavior by doing:
// See browser/modules/webrtcUI.jsm for detail</nowiki>
Example extension: http://hancke.name/tmp/verhueterli.xpi (source: https://github.com/fippo/plumber). Note: unsigned extensions require flipping a pref to use (and can't be used in Beta 41).</s>