Bug 1792882 - test_interfaces.js should not check pref values. r=smaug, a=test-only

// This is a list of all interfaces that are exposed to every webpage.

// Please only add things to this list with great care and proper review

// from the associated module peers.

//

// The test is supposed to check whether our actual exposure behavior

// matches what we expect, with the latter expressed in terms of outside

// observables like type of build (nightly, release), platform, secure

// context, etc. Testing based on prefs is thus the wrong check, as this

// means we'd also have to test whether the pref value matches what we

// expect in terms of outside observables.

// This file lists global interfaces we want exposed and verifies they

// are what we intend. Each entry in the arrays below can either be a

  {

    name: "InstallTrigger",

    insecureContext: true,

    disabled: !SpecialPowers.Services.prefs.getBoolPref(

      "extensions.InstallTrigger.enabled"

    ),

    disabled: isEarlyBetaOrEarlier,

  },

  // IMPORTANT: Do not change this list without review from a DOM peer!

  { name: "IntersectionObserver", insecureContext: true },