[navigator-install-bad-inputs.tentative.https.html]
  [navigator.install("") rejects with TypeError for empty install URL.]
    expected: FAIL

  [navigator.install("://invalid") rejects with TypeError for invalid URL.]
    expected: FAIL

  [navigator.install(url, "") rejects with TypeError for empty manifest ID.]
    expected: FAIL

  [navigator.install("   ") rejects with TypeError for whitespace-only URL.]
    expected: FAIL

  [navigator.install(url, null) rejects with TypeError for null manifest ID.]
    expected: FAIL

  [navigator.install(url, undefined) rejects with TypeError for undefined manifest ID.]
    expected: FAIL