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On websites which open pop-under windows, Firefox 4 seems to be opening these over the current window instead of under. Is this a bug or an intentional feature?

  • 6 replies
  • 254 have this problem
  • 2 views
  • Last reply by marques99

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I have noticed a problem on FF4 when browsing sites that open pop-under windows on a user action. With all other browsers (including FF3) these open underneath the main window, but on Firefox 4 they open over the top - acting as pop-ups and not pop-unders.

While pop-unders are annoying, it is even more annoying to have them keep appearing as pop-ups instead.

I have run some tests and the following code successfully opens a pop-under on all browsers except Firefox 4.

It appears that window.focus() is not correctly bringing the current window to the top.

Example code:

   var w = window.open('http://www.mydomain.com/', 'mywin', 'width=400,height=300,toolbar=1,menubar=1,resizable=1,scrollbars=1');
   if(w){
       w.blur();
       window.focus();
   }
I have noticed a problem on FF4 when browsing sites that open pop-under windows on a user action. With all other browsers (including FF3) these open underneath the main window, but on Firefox 4 they open over the top - acting as pop-ups and not pop-unders. While pop-unders are annoying, it is even more annoying to have them keep appearing as pop-ups instead. I have run some tests and the following code successfully opens a pop-under on all browsers except Firefox 4. It appears that window.focus() is not correctly bringing the current window to the top. Example code: var w = window.open('http://www.mydomain.com/', 'mywin', 'width=400,height=300,toolbar=1,menubar=1,resizable=1,scrollbars=1'); if(w){ w.blur(); window.focus(); }

All Replies (6)

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This is normal. Firefox 4 has disabled the default "window flip". - go to adress about:config - accept and search dom.disable_window_flip set to false; And popunder, blur/focus javascript function will be back ;)

Modified by MrPing

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FF3 has the same dom.disable_window_flip set to true, and the example above is not an issue. Using window.focus and window.blur work, and pop-unders pop 'under' not 'over' as they do in FF4.

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hum.. when i set dom.disable_window_flip to false in FF4 pop-unders it's ok. Yes, the parameter is to true in FF3 and pop-unders ok. Strange...

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there are multiple ways of having pop under working in firefox 4 :-) $1000 and it works - got.by.0@gmail.com

Modified by c0der

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Is this just a browser configuration? How do you override this via JavaScript and override the browser config?

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So the developers of firefox thought it would be a good idea to force pop unders to pop up? Do they think websites are going to stop using them? If I had to choose I rather have a pop under then a pop up. Chrome, IE and Safari handle pop unders the same why does firefox have to be difficult.