705617 - Never-ending synchronous XMLHttpRequest on unload and beforeunload freezes down Firefox

Status: RESOLVED WORKSFORME

(Core :: DOM: Core & HTML, defect)

Description

[Mikhail Davydov]

Attachment: onunload-test.zip

User Agent: Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; ru) Presto/2.9.168 Version/11.52

Steps to reproduce:

1. Add event listener to unload and beforeunload with never endind synchronous XMLHttpRequest (on server side: setTimeout(function () {res.end();}, 36565656)).
2. Close or refresh page
3. Tab freeses
4. Press [X] close tab and tab closes, but...


Actual results:

Firefox freeses down (impossible to create a tab on navigate to any page)


Expected results:

After I press [X] second time Firefox should abort any synchronous XHMHttpRequest with any exception or state=0

Archive with test files is attached

Comment 1

[Joris van der Wel [:JoWie]]

I came across this today.

I think this is a regression. In firefox 3.6 (onbeforeunload) the tab simply stays open until the request was done. However if the user pressed the close button again, the request would be aborted and the tab would close.
I am not sure at what specific version this changed.

Comment 2

[Mikhail Davydov]

16.0.2 and 17.0.1 are still affected. I cant close that tab (2+ clicks on X). There is more - I cant crate a new tab and I cant even close firefox.

Comment 3

[Jesse Ruderman]

Related to bug 767102?

Comment 4

[O. Atsushi (Torisugari)]

I can't reproduce the problem with the attached zip file. Firefox 24 release with Win8 x64. Any other testcase?

Comment 5

[Mikhail Davydov]

I still can reproduce this bug in Firefox 24 release for Mac, using the same steps.

Comment 6

[Daniel Veditz [:dveditz]]

This works for me--you can successfully close the trap page's tab. Probably fixed by the timeout added in bug 1307122?