Bug 1298394 - Add Learn More link for MimeTypeMisMatch error messages. r=bgrins

devtools/server/actors/errordocs.js

@@ -56,6 +56,7 @@ const INSECURE_PASSWORDS_LEARN_MORE = "https://developer.mozilla.org/docs/Web/Se
 const PUBLIC_KEY_PINS_LEARN_MORE = "https://developer.mozilla.org/docs/Web/Security/Public_Key_Pinning";
 const STRICT_TRANSPORT_SECURITY_LEARN_MORE = "https://developer.mozilla.org/docs/Web/Security/HTTP_strict_transport_security";
 const WEAK_SIGNATURE_ALGORITHM_LEARN_MORE = "https://developer.mozilla.org/docs/Web/Security/Weak_Signature_Algorithm";
+const MIME_TYPE_MISMATCH_LEARN_MORE = "https://developer.mozilla.org/docs/Web/HTTP/Headers/X-Content-Type-Options";
 const ErrorCategories = {
   "Insecure Password Field": INSECURE_PASSWORDS_LEARN_MORE,
   "Mixed Content Message": MIXED_CONTENT_LEARN_MORE,
@@ -64,6 +65,7 @@ const ErrorCategories = {
   "Invalid HSTS Headers": STRICT_TRANSPORT_SECURITY_LEARN_MORE,
   "SHA-1 Signature": WEAK_SIGNATURE_ALGORITHM_LEARN_MORE,
   "Tracking Protection": TRACKING_PROTECTION_LEARN_MORE,
+  "MIMEMISMATCH": MIME_TYPE_MISMATCH_LEARN_MORE,
 };
 
 exports.GetURL = (error) => {