1 files changed, 29 insertions, 0 deletions
diff --git a/src/lib/restricted.js b/src/lib/restricted.js
new file mode 100644
index 0000000..ae85ba8
--- /dev/null
+++ b/src/lib/restricted.js
@@ -0,0 +1,29 @@
+{
+  // see https://bugzilla.mozilla.org/show_bug.cgi?id=1415644
+  let domains = [
+  "accounts-static.cdn.mozilla.net",
+  "accounts.firefox.com",
+  "addons.cdn.mozilla.net",
+  "addons.mozilla.org",
+  "api.accounts.firefox.com",
+  "content.cdn.mozilla.net",
+  "content.cdn.mozilla.net",
+  "discovery.addons.mozilla.org",
+  "input.mozilla.org",
+  "install.mozilla.org",
+  "oauth.accounts.firefox.com",
+  "profile.accounts.firefox.com",
+  "support.mozilla.org",
+  "sync.services.mozilla.com",
+  "testpilot.firefox.com",
+  ];
+
+  function isRestrictedURL(u) {
+    try {
+      if (typeof u === "string") u = new URL(u);
+      return u.protocol === "https:" && domains.includes(u.hostname);
+    } catch (e) {
+      return false;
+    }
+  }
+}