1573397 - Ensure we have a mixed content test for loading mixed <object> elements

Status: NEW

(Firefox :: Site Identity, task, P3)

Description

[Johann Hofmann [:johannh]]

We are removing this test https://searchfox.org/mozilla-central/rev/ec806131cb7bcd1c26c254d25cd5ab8a61b2aeb6/testing/firefox-ui/tests/functional/security/test_mixed_script_content_blocking.py#21 and I think we have all the basic mixed content test cases covered (scripts, styles, images) but we should ensure that the plugin case is handled, too:

<span id="result3">NOT LOADED<object type="text/html" data="http://mixed-content-tests-mozilla.org/mozqa/mixed_content_blocked/scripts/object.html"></object></span>

(from https://mixed-content-tests-mozilla.org/mozqa/mixed_content_blocked/)