The JSON viewer in the Developer Tools uses insecure methods to create a communication channel for copying and viewing JSON or HTTP headers data, allowing for potential privilege escalation. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "51.0.1+build2-0ubuntu0.14.04.1"
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        {
            "binary_name": "firefox-dev",
            "binary_version": "51.0.1+build2-0ubuntu0.14.04.1"
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        {
            "binary_name": "firefox-globalmenu",
            "binary_version": "51.0.1+build2-0ubuntu0.14.04.1"
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            "binary_name": "firefox-mozsymbols",
            "binary_version": "51.0.1+build2-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-testsuite",
            "binary_version": "51.0.1+build2-0ubuntu0.14.04.1"
        }
    ]
}
          {
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "thunderbird",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-dev",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-globalmenu",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "thunderbird-testsuite",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:45.7.0+build1-0ubuntu0.14.04.1"
        }
    ]
}
          {
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "51.0.1+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "51.0.1+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-globalmenu",
            "binary_version": "51.0.1+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "51.0.1+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-testsuite",
            "binary_version": "51.0.1+build2-0ubuntu0.16.04.1"
        }
    ]
}
          {
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "thunderbird",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-dev",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-globalmenu",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "thunderbird-testsuite",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:45.7.0+build1-0ubuntu0.16.04.1"
        }
    ]
}