284596 - onbeforeunload event is not fired on browser close

Status: RESOLVED WORKSFORME

(Core :: DOM: Events, defect)

Description

[Ian Neal]

Using Build 2005013106 on Win2K SP3
Steps to reproduce
1. Start mozilla with a -browser http://url.to.a.page/with/onbeforeunload/in/body
2. Click on X to close

Expected result
1. Dialog appears from onbeforeunload

Actual result
1. Browser just closes

This can cause dataloss if the purpose of the unbeforeunload is to stop you
navigating away/closing the page before you complete the task the page is for.

It works fine if you fire up mozilla normally and go to the URL

Comment 1

[Ian Neal]

Attachment: Testcase

Comment 2

[Ian Neal]

If you start testcase using:
mozilla -browser https://bugzilla.mozilla.org/attachment.cgi?id=176135

Comment 3

[beanladen]

WFM 1.8b1 Mozilla Suite Solaris 8 Sparc

Comment 4

[Ng Ming Hong]

WFM: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b) Gecko/20050217

Comment 5

[Ng Ming Hong]

Sorry, correction: don't WFM
Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b) Gecko/20050217

Comment 6

[Ian Neal]

Reproduced on BuildID 2005020312 on Linux RH9
Reproduced on 1.8a5 on Solaris 9 Sparc
Reproduced on 1.8b1 on Solaris 9 Sparc

Comment 7

[beanladen]

Re comment #3: Sorry, also NOT wfm. Tested without -browser.

Comment 8

[Boris Zbarsky [:bzbarsky]]

jst, didn't we have a similar bug somewhere that we fixed in the 1.8 cycle?

Comment 9

[Boris Zbarsky [:bzbarsky]]

That is, I recall a bug that only showed up on pages loaded directly on startup,
not ones we navigated to.  It wasn't about onbeforeunload, iirc....

Comment 10

[Mats Palmgren (inactive)]

WFM, SeaMonkey 20070209 Linux. (The dialog appears twice on Quit though -
filed bug 369955 on that.)

Comment 11

[beanladen]

WFM Seamonkey 1.1 Linux(X11; U; Linux i686; en-US; rv:1.8.1.2pre) Gecko/20070121
Dialog does NOT appear twice here.

Comment 12

[beanladen]

Sorry, #11 should have been 'WFM, but Dialog DOES appear twice on Quit'

Comment 13

[Mats Palmgren (inactive)]

WFM, SeaMonkey 2007020305 on MacOSX (bug 369955 occurs though)
WFM, SeaMonkey 2007020909 on Windows Vista (bug 369955 occurs though)

-> WORKSFORME