description: WebExtensions could use popups and panels in the extension UI to load an "about:" privileged URL, violating security checks that disallow this behavior. This vulnerability affects Firefox < 56.
problem types: WebExtensions can load about: URLs in extension UI
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 56, status: affected, version: unspecified, versionType: custom
}