make 1601 setup tag more explicit, closes #1326

user.js

@@ -573,7 +573,6 @@ user_pref("gfx.font_rendering.opentype_svg.enabled", false);
    // user_pref("layout.css.font-visibility.trackingprotection", 1);
 
 /*** [SECTION 1600]: HEADERS / REFERERS
-   Expect some breakage e.g. banks: use an extension if you need precise control
                   full URI: https://example.com:8888/foo/bar.html?id=1234
      scheme+host+port+path: https://example.com:8888/foo/bar.html
           scheme+host+port: https://example.com:8888
@@ -582,7 +581,8 @@ user_pref("gfx.font_rendering.opentype_svg.enabled", false);
 user_pref("_user.js.parrot", "1600 syntax error: the parrot rests in peace!");
 /* 1601: control when to send a cross-origin referer
  * 0=always (default), 1=only if base domains match, 2=only if hosts match
- * [SETUP-WEB] Known to cause issues with older modems/routers and some sites e.g vimeo, icloud, instagram ***/
+ * [SETUP-WEB] Breakage: older modems/routers and some sites e.g banks, vimeo, icloud, instagram
+ * If "2" is too strict, then override to "0" and use Smart Referer (Strict mode + add exceptions) ***/
 user_pref("network.http.referer.XOriginPolicy", 2);
 /* 1602: control the amount of cross-origin information to send [FF52+]
  * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/