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
Differential Revision: https://phabricator.services.mozilla.com/D58104 --HG-- extra : moz-landing-system : lando
Note:
While conceptually similar to the tests for Web Authentication (dom/webauthn),
the tests for U2F require an iframe while window.u2f
remains hidden behind a
preference, though WebAuthn does not. The reason is that the window
object
doesn't mutate upon a call by SpecialPowers.setPrefEnv() the way that the
navigator
objects do, rather you have to load a different page with a different
window
object for the preference change to be honored.