mathml: a better test

user.js

@@ -1295,7 +1295,7 @@ user_pref("devtools.debugger.remote-enabled", false);
 user_pref("devtools.webide.enabled", false);
 user_pref("devtools.webide.autoinstallADBExtension", false); // [FF64+]
 /* 2609: disable MathML (Mathematical Markup Language) [FF51+] [SETUP-HARDEN]
- * [TEST] http://browserspy.dk/mathml.php
+ * [TEST] https://ghacksuserjs.github.io/TorZillaPrint/TorZillaPrint.html#misc
  * [1] https://bugzilla.mozilla.org/1173199 ***/
    // user_pref("mathml.disabled", true);
 /* 2610: disable in-content SVG (Scalable Vector Graphics) [FF53+]