Web-accessible extension pages (pages with a moz-extension:// scheme) were not correctly enforcing the frame-ancestors directive when it was used in the Web Extension's Content Security Policy. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.
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"binary_name": "xul-ext-gdata-provider",
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"binary_name": "thunderbird-mozsymbols",
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{
"binary_name": "xul-ext-calendar-timezones",
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{
"binary_name": "xul-ext-gdata-provider",
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{
"binary_name": "xul-ext-lightning",
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}