Closed
Bug 287543
Opened 20 years ago
Closed 20 years ago
Firefox goes 100% CPU and unresponsive when alert closed after page load
Categories
(Firefox :: General, defect)
Tracking
()
RESOLVED
DUPLICATE
of bug 225302
People
(Reporter: daern, Assigned: bugzilla)
Details
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050220 Firefox/1.0+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050317 Firefox/1.0.2
The following HTML (loaded locally or from a server) displays an alert which is
repeatedly shown. Once it has been clicked a few times (2 or 3 usually), Firefox
goes unresponsive and 100% CPU.
Yes, I know the javascript sucks (I actually noticed it on a website on our WAN)
but it shouldn't cause a browser crash...
<html>
<head>
<script Language="JavaScript">
function checkBrowser(){
if (navigator.appName != "Microsoft Internet Explorer"){
navi = navigator.appName;
ver = navigator.Version;
alert("Sorry " + navi + " is an unauthorized browser for this application
Please use Microsoft Internet Explorer");
window.location = "http://www.getfirefox.com";
}
}
</script>
</HEAD>
<title>Bang!</title>
<body onload="checkBrowser()" onfocus="checkBrowser()" BGCOLOR="#FFFFFF"
TEXT="#000000" LINK="#000066" ALINK="#FF0000" VLINK="#000066"
MARGINWIDTH="0" MARGINHEIGHT="0" LEFTMARGIN="0" TOPMARGIN="0">
</body>
</html>
Reproducible: Always
Steps to Reproduce:
1. Open the attached HTML (from local PC or server)
2. Click the alert a few times
3. Bang, dead firefox
Actual Results:
Firefox became unresponsive and started consuming 100% CPU cycles
Expected Results:
Hmmm, probably displayed the alert ad-infinitum.
Reproducable in Firefox 1.0 and 1.0.2
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Comment 1•20 years ago
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Possibly bug 225302. Does Firefox crash or does it only lock-up?
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Reporter | |
Comment 2•20 years ago
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(In reply to comment #1)
> Possibly bug 225302. Does Firefox crash or does it only lock-up?
Doesn't crash, just locks up. It's a dupe. Sorry about that :-(
*** This bug has been marked as a duplicate of 225302 ***
Status: UNCONFIRMED → RESOLVED
Closed: 20 years ago
Resolution: --- → DUPLICATE
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Description
•