Jeroen Massar Reporter
	Description • 19 years ago

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050418 Firefox/1.0.3 (Debian package 1.0.3-1)
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050418 Firefox/1.0.3 (Debian package 1.0.3-1)

The following piece on a page:

<script LANGUAGE="JavaScript">
while (1)
{
        window.alert("Get out get, get out if you can...");
}
</script>

causes an endless clicking loop and one is not able to do anything against it.
The dialog is modal and thus that firefox window, including it's tabs is
completely useless. For people browsing with tabs only this will be very
annoying. (Unless you disable javascript of course ;)

Reproducible: Always

Steps to Reproduce:
1. Install firefox
2. Open a page with the above javascript eg
http://unfix.org/~jeroen/archive/javascript_loop.html
3. Pray that this bug is fixed, javascript is enabled or that you don't have any
important things you still needed to save.

Actual Results:  
Infinite window.alarm()'s are called thus giving a modal messagebox which one
can't get away from.

Expected Results:  
Exactly this and that is why it is so silly.

What it should have in the dialog is a "Disable continuation of Javascript
execution" button somewhere. Or at least allow one to switch to another tab etc.

IMHO this is a security problem as this can cause high agitation to users but
more importantly it looses your current session, thus open tabs etc, as you need
to kill firefox.

Also confirmed in MSIE, Konqueror, Opera and others...
MSIE problem is not that high as you can ignore/kill that single window, as it
currently does not have tabbing.

Please fix ;)

	Daniel Veditz [:dveditz]
	Comment 1 • 19 years ago

See also bug 123913 and bug 61098

*** This bug has been marked as a duplicate of 59314 ***

	Jeroen Massar Reporter
	Comment 2 • 19 years ago

This is indeed a dupe, didn't pop up easily in bugzilla weirdly. Anyhow, I hope
to see this fixed sooner or later.... bug 59314 was reported almost 5 years ago...