If a page has an onbeforeunload event handler which returns a string to produce a dialog, *and* the previous page resulted from a POST which necessitates the POST warning dialog, then hitting the back button will cause he following to occur: - The onbeforeunload dialog shows up. Hit "Leave Page". - The POST warning dialog shows up. Hit "Resend" to proceed with re-POSTing. - The onbeforeunload dialog shows up again. Bug. I discovered this bug when I went to edit a wiki page after logging in to that wiki via a POST. Steps to reproduce via the GNOME wiki, which will probably work on just about any wiki: - Have an account on https://live.gnome.org/ . Anyone can register an account there. - Start from a logged-out state, on any page you can edit. - Click the login link (in the right sidebar). - Log in; this submits the login form via a POST, and returns you to the page. - Click the "Edit" button. - Make any change to the page contents in the edit box; this enables the onbeforeunload handler. (Don't save your changes.) - Hit the back button.
Can Reproduce on the latest Nightly Updated Steps to Reproduce: 1.Go to https://live.gnome.org/ 2.Log-in 3.Click "Edit" 4.Type anything in the edit box 5.Click the Back button 6.Click "Leave Page" Actual Results: 7.Another "Leave Page" dialog appears Expected Results: 7.You are on the Gnome live Home page, without a second "Leave Page" dialog appearing Chromium only displays one dialog
I can also confirm that this occurs in the latest Nightly as of writing (Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0a1) Gecko/20111028 Firefox/10.0a1) Also, on top of the double "Leave Page" dialogs, I get a "Document Expired" error as well.
https://bugzilla.mozilla.org/show_bug.cgi?id=1472046 Move all DOM bugs that haven’t been updated in more than 3 years and has no one currently assigned to P5. If you have questions, please contact :mdaly.
Priority: -- → P5
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