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

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

WFM 1.8b1 Mozilla Suite Solaris 8 Sparc

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

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

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

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

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

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....

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

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

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

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