function breaks on error page.

[0rt]

// ==UserScript==
// @name Error Page Auto Reload
// @include *
// ==/UserScript==
alert('I was run!');

the above user.js won't function in error page. You can test it this way:

1. install the above user.js
2. set a non-exist proxy, Type any URL and enter
   or just go to a non-exist site if your DNS won't redirect you when error
3. nothing happen... well, it should alert, right?

[arantius]

By design. See #1375 (error pages are really about:neterror?.... ).

[0rt]

is it a backfire of issue #1375 ?