This change will be the first of multiple changes to control permissions in FxR on PC. This change introduces a new class, FxrPermissionPromptPrototype, in the FxR front end code. With the introduction of this class, all permission requests are denied by default. Subsequent changes will provide UI to give user control.
Differential Revision: https://phabricator.services.mozilla.com/D52283
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extra : moz-landing-system : lando