User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 (Beta/Release) Build ID: 20131112160018 Steps to reproduce: Type in any form data, then try to leave the page. A popup message will stop you from leaving the page, and tell you "This page is asking you to confirm that you want to leave - data you have entered may not be saved." Actual results: This popup message interupted my focus and prevented me from performing the action I wanted to perform. Expected results: There should be a way to permanently disable this "feature". It is an annoyance and and a clear vector for security exploit. In my opinion, this "feature" should be turned off by default, or just removed completely from Firefox.
BUMP. NOT RESOLVED. NOT A DUPLICATE.
See bug 578828 for changing the default.
This doesn't need to stay in Untriaged. There would be a back-end component to this bug, but the summary "Add an option to disable onbeforeunload dialogs" implies a front-end option available to the user, so I'll move it to Preferences.
Created attachment 8349406 [details] [diff] [review] add a pref to disable onbeforeunload, I think a pref for this is something we should do. Less convinced about UI for this pref as we've removed UI for much more coarse-grained stuff already, so adding a checkbox for this seems like overkill.
Comment on attachment 8349406 [details] [diff] [review] add a pref to disable onbeforeunload, r=me of if you fix the spelling of "onbeforeunload" in the comment and add this pref to all.js so it shows up in about:config.
Wow, impressive. Thank you guys.
I wasn't able to reproduce this issue with the Nightly from 2013-11-12 on Win 8 x86 (although I did see that the "dom.disable_beforeunload" pref wasn't available in this build). I tried with both https://myaccount.nytimes.com/register?action=click®ion=Masthead&pgtype=Homepage&module=Registration&contentCollection=Homepage&t=qry746 and https://bug17447.bugzilla.mozilla.org/attachment.cgi?id=2467 to close the tabs containing them, but I didn't get any pop-up message. Could you please provide some URLs that reproduce this issue?
(In reply to Manuela Muntean [:Manuela] [QA] from comment #12) > I wasn't able to reproduce this issue with the Nightly from 2013-11-12 on > Win 8 x86 (although I did see that the "dom.disable_beforeunload" pref > wasn't available in this build). > I tried with both > https://myaccount.nytimes.com/ > register?action=click®ion=Masthead&pgtype=Homepage&module=Registration&con > tentCollection=Homepage&t=qry746 and > https://bug17447.bugzilla.mozilla.org/attachment.cgi?id=2467 to close the > tabs containing them, but I didn't get any pop-up message. > > Could you please provide some URLs that reproduce this issue? Try the testcase in bug 636374.
Verified as fixed with latest Aurora and the testcase in bug 636374, on: Win 8 x86, Ubuntu 13.04 x64, Mac 10.8.5.
Boris, I was discussing this earlier with dolske - the implementation here means no "beforeunload" event fires anymore, which I thought might be broken - ie, we should fire the event but just never show the dialog even when the page says it wants us to (so pretend the user says "yes, I really want to leave" every time). Would you agree that we should change that? (I'll file a followup bug, but am needinfo'ing here for better context)
Hmm. Yeah, that might be a better idea.