1273: add "Not Secure" text on HTTP

https://bugzilla.mozilla.org/show_bug.cgi?id=1335970

user.js

@@ -827,9 +827,11 @@ user_pref("browser.ssl_override_behavior", 1);
  * i.e. it doesn't work for HSTS discrepancies (https://subdomain.preloaded-hsts.badssl.com/)
  * [TEST] https://expired.badssl.com/ ***/
 user_pref("browser.xul.error_pages.expert_bad_cert", true);
-/* 1273: display HTTP sites as insecure (FF59+) ***/
+/* 1273: display "insecure" icon (FF59+) and "Not Secure" text (FF60+) on HTTP sites ***/
 user_pref("security.insecure_connection_icon.enabled", true); // all windows
+user_pref("security.insecure_connection_text.enabled", true);
    // user_pref("security.insecure_connection_icon.pbmode.enabled", true); // private windows only
+   // user_pref("security.insecure_connection_text.pbmode.enabled", true);
 
 /*** 1400: FONTS ***/
 user_pref("_user.js.parrot", "1400 syntax error: the parrot's bereft of life!");