This is on a desktop version of Firefox? Most likely this is a Flash plugin request. To manage your camera and microphone permission in Flash, you can use these two pages: * Your general setting: [http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager02.html Adobe - Flash Player : Settings Manager - Global Privacy Settings Panel] * Site settings: [http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager06.html Adobe - Flash Player : Settings Manager - Website Privacy Settings panel] Note: If you use add-ons or external software to purge Flash Player storage, this might be clearing site permissions at the same time. Worth checking the documentation or watching for a pattern.

No, it is definitely HTML5 request. I am using the https://developer.mozilla.org/en-US/docs/Web_Audio_API

Oh, the bleeding edge?! Permission persistence for getUserMedia() is under active development for about the past 30 days. See: * [https://bugzilla.mozilla.org/show_bug.cgi?id=804611 Bug 804611 – Add a "Don't ask me again" option to getUserMedia permission dialog] * [https://bugzilla.mozilla.org/page.cgi?id=etiquette.html Bugzilla Etiquette] * [https://bugzilla.mozilla.org/page.cgi?id=voting.html Voting]

I see. Thanks.