We'd like to disallow modal dialogs (i.e., those arising from calls to alert, confirm, prompt or showModalDialog) during unload events (beforeunload, unload and pagehide) [1]. Chromium wants to do this [2]. Since this affects web compatibility, I'd like to get agreement from the other webkit ports as well. The benefits are: + Fewer annoyances for users who are trying to leave a page. + In the case of tab close, allows the browser to hide the tab before it has finished running the unload or pagehide event handlers (doesn't apply to beforeunload); gives the impression of better performance. This doesn't affect returning a non-null value from beforeunload; that will still cause the browser to show the stay-or-leave dialog. We think that is sufficient to satisfy legitimate needs to warn the user about data loss, etc. Outside webkit, this has been discussed on whatwg, but without a definite conclusion [3]. Firefox seems to be considering this as well [4]. All in favour, say aye! [1] https://bugs.webkit.org/show_bug.cgi?id=56397 [2] http://code.google.com/p/chromium/issues/detail?id=68780 [3] http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2010-February/025080.htm... [4] https://bugzilla.mozilla.org/show_bug.cgi?id=391834