If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HMozilla Firefox
APPMozilla< 88.0Mozilla Firefox Esr
APPMozilla< 78.10Mozilla Thunderbird
APPMozilla< 78.10
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