User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0 Build ID: 20160502172042 Steps to reproduce: 1. Receive new mail popup notification in Outlook Web App 2. Click X to close notification Actual results: New window opens with email Expected results: Notification should close

This sounds like it could be similar to https://bugzilla.mozilla.org/show_bug.cgi?id=785490

jaws, what do you think? Maybe this is a new issue in Windows 10.

It looks like this has some different styling than our notifications, maybe it is some part of the Outlook Web Access website? I don't think I have access to an Outlook Web Access account. Juliana, does this notification appear outside of the Firefox window? Does it appear if Firefox is minimized? If this is part of the webpage, there isn't much we can do here. Our notifications are external to the Firefox window. Alternatively, do you have any themes installed that may have changed the look of our notifications? Can you reproduce this bug if you choose "Restart with Add-ons Disabled..." from the Firefox Help menu (Alt+H)?

Yes, these are pop-ups that come from the Outlook Web App webpages, rather than being Firefox notifications. Apologies. This issue occurs in the latest version of Firefox on Mac OSX and Windows 10 and 7 machines. It does not occur in current versions IE, Chrome, or Safari. We spoke with Microsoft Premier support about this issue and their position is that it's not an issue they're going to address since it occurs only in Firefox. However, I entirely understand if the Firefox development community sees this differently, or if there's little to be done on the Firefox side, particularly since it requires an Outlook account.

Also note: I did try restarting Firefox with add-ons disabled; this did not resolve the issue.

Thanks for the reply.

You can file this at https://webcompat.com/ so it can be investigated as to why it works differently for Firefox.

Hm.. We're looking at nested BUTTON elements! <button type="button" class="ms-bgc-nl-h o365button o365cs-notifications-newMailLink"><div class="o365cs-notifications-newMailPopupButton ms-bcl-tp"> <div class="o365cs-notifications-newMailPopupButtonCell"> <div class="o365cs-notifications-newMailPopupButtonContent"> <span style="display: none;" autoid="__Microsoft_O365_ShellG2_Owa_templates_cs_Y" class="wf-size-x14 o365cs-notifications-text ms-fcl-nd">You have 1 new messages</span> <div><div style="display: none; background-color: rgb(0, 163, 0); outline-color: rgb(0, 163, 0);" class="o365cs-notifications-newMailPersonaImage">HR</div><img class="o365cs-notifications-newMailPersonaImageDontDisplay" src="service.svc/s/GetPersonaPhoto?email=hallvord@hallvord.com&amp;UA=0&amp;size=HR64x64&amp;sc=1465392546749" style=""><span autoid="__Microsoft_O365_ShellG2_Owa_templates_cs_Z" class="wf-size-x14 o365cs-notifications-text o365cs-segoeRegular">Hallvord Reiar Michaelsen Steen</span><span autoid="__Microsoft_O365_ShellG2_Owa_templates_cs_01" class="wf-size-x12 o365cs-notifications-text o365cs-segoeSemiBold ms-fcl-tp">hallo, bli der da du boks</span><span autoid="__Microsoft_O365_ShellG2_Owa_templates_cs_11" class="wf-size-x12 o365cs-notifications-text o365cs-notifications-bodypreviewtext o365cs-segoeSemiLight ms-fcl-ns"> </span></div> <button aria-label="Close" type="button" class="o365cs-notifications-closeButton ms-fcl-np ms-bgc-w-h o365button"><span class="o365cs-notifications-closeIcon owaimg ms-Icon--x ms-icon-font-size-16"> </span></button> </div> </div> </div></button> That's a weird way to do things.. :-o

not sure what it is supposed to do, but Blink and Gecko seems consistent here http://codepen.io/anon/pen/EyVJKq They create two individual buttons.

One needs to actually use JS to create such a DOM with truly nested buttons. The markup parser will not allow the construct. The interesting thing here is that Gecko does not fire any click event on the inner BUTTON at all. From the script's point of view, clicking the inner BUTTON (the X) can not be distinguished from clicking the outer (which opens the E-mail).

This rings a bell, I think there is a master or related bug (perhaps to do with BUTTON inside A or vice versa). Boris, do you know?

See discussion in bug 1089326.

Boris, why does this depend on bug 1089326 instead of just being a dupe?

Because it's entirely non-obvious to me what changes will get made for bug 1089326 in the end and whether they will fix the observable website problem here.