A legacy extension’s non-contentaccessible, defined resources can be loaded by an arbitrary web page through script. This script does this by using a maliciously crafted path string to reference the resources. Note: this vulnerability does not affect WebExtensions. This vulnerability affects Firefox < 59.
[
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "59",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]