Am 24.05.2012 18:16, schrieb Matt Kruse:
After updating FF from 3.6 to the current 12, user scripts run at
document-start (in certain situations) are firing twice - once at
document-start as intended, then again at document-end.
Sample script:
// ==UserScript==
// @name FB Test
// @namespace http://userscripts.org/users/86416
// @include https://www.facebook.com/
// @run-at document-start
// ==/UserScript==
alert(document.getElementsByTagName('BODY').length);
When viewing the home news feed, this alerts "0" (expected), but then
also alerts "1" after the document loads.
But when I log off and load the login page, it only alerts "0"!
Any idea if this is a Greasemonkey bug or a FF bug? Or a quick in
Facebook? I can't duplicate the same functionality on CNN.com, for
example.
Is Facebook doing something that causes GM to fire again?
I've not yet tested other browser versions, will do that as well.
Thanks!
Matt Kruse
I could well imagine some iframe that retriggers the script because two
"document-start" events are fired, maybe? Or does the page have two html
or body tags?
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