When an https: web page created a pop-up from a "javascript:" URL, that pop-up was incorrectly allowed to load blockable content such as iframes from insecure http: URLs This vulnerability affects Firefox < 120.
{
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "120.0+build2-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "120.0+build2-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-geckodriver",
            "binary_version": "120.0+build2-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "120.0+build2-0ubuntu0.20.04.1"
        }
    ],
    "availability": "No subscription required"
}