1272510 - Firefox triggers blur event after focusing window

Status: UNCONFIRMED

(Core :: DOM: Events, defect)

Description

[bartoszpop]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.94 Safari/537.36

Steps to reproduce:

I have a problem with focusing the previously opened window in the Firefox browser. In the first step I append a clickable span element with a 'onmousedown' handler which opens a new window if the element is clicked.


Actual results:

A newly created window is focused correctly but after focusing the main window and clicking the span element again the previously created window is being focused and immediately blured.
https://jsfiddle.net/bartoszpop/mjeh5rdh/


Expected results:

The blur event shouldn't occur.

Comment 2

[Andrew Overholt [:overholt]]

qDot, wanna take a quick look here? (yes, not your usual wheelhouse)

Comment 3

[Kyle Machulis [:qdot] [:kmachulis] (INACTIVE)]

So, testing this on Nightly 50.0a1 2016-06-14 on Mac OS X, I'm getting odd behavior that doesn't match the STR but still isn't right. Using the jsfiddle link in Comment #0, if I click on the Click Here link, the new window is opened but not focused. Clicking on/off the new window triggers focus/blur events as expected. However, clicking the "Click here" span again in the jsfiddle after that does nothing. I'd expect that it should still be focusing the new window?

Comment 4

[bartoszpop]

Recently I made a little change (removed <br> tag) in the jsfiddle that changed the behaviour - see https://jsfiddle.net/bartoszpop/mjeh5rdh/15/ for the origin source.

Comment 5

[Loic]

Jessica, as you worked recently on the "blur" event, could you check this bug report if you have some time, please.

Comment 6

[Jessica Jong [:jessica] (inactive)]

I am getting similar behavior to comment 3, except that on the first time I click on the span, the new window is opened and focused ("openewWindow.focus()" is logged). After that, clicking on the span again does nothing.

I can take a look at it, but it may take some more time, as I am not really familiar with this part of the code.

Comment 7

[Jessica Jong [:jessica] (inactive)]

Attachment: test-bug-1272150.html

It turns out that clicking on the span did nothing was a jsfiddle thing, when testing using the attached page, I can reproduce the bug on OSX but not on Linux.

What is more, the issue is not found on Nightly (e10s) but is found on Nightly (non-e10s). So I am not sure whether I should keep digging in or not, since non-e10s bugs are not in our priority list.

Comment 8

[Andrew Overholt [:overholt]]

It would be nice if non-e10s and e10s lined up here but given the pending release of e10s it's probably not the end of the world if this is only correct in e10s mode.