javascript - Window popups - how to get window.blur() or window.focus() to work in FireFox 4? - Stack Overflow

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I'm aware that FF4 doesn't allow the use of window.blur() unless "Raise or lower window" setting is enabled in the FF configuration. It simple ignores the event.

I'm aware that some site still manage to open a pop-up window and keep focus on your current window, even when this setting is switched off. How do they achieve this?

Additionally, I don't understand why .blur() and .focus() doesn't work when both pages reside on the same domain. According to this should work.

I'm aware that FF4 doesn't allow the use of window.blur() unless "Raise or lower window" setting is enabled in the FF configuration. It simple ignores the event.

I'm aware that some site still manage to open a pop-up window and keep focus on your current window, even when this setting is switched off. How do they achieve this?

Additionally, I don't understand why .blur() and .focus() doesn't work when both pages reside on the same domain. According to http://support.mozilla./en-US/questions/806756#answer-167267 this should work.

• javascript
• html
• firefox
• popup

Share Improve this question Follow edited Nov 3, 2011 at 16:44 asked Nov 3, 2011 at 14:07 user338195user338195 4

• Can you give us an example of the site that you saw ? it might not be a pop-up in the traditional sense - might well be a div within the page that looks like a pop-up – Manse Commented Nov 3, 2011 at 14:11
• Hi, PirateBay does it as soon as you click on any of their links. – user338195 Commented Nov 3, 2011 at 14:14
• Why support so old browser? Current Fx version is 8. – Wojciech Bednarski Commented Nov 9, 2011 at 1:33
• It's a requirement, not everybody updates to the newest version as soon as it es out. – user338195 Commented Nov 10, 2011 at 11:46

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2 Answers 2

Sorted by: Reset to default 6 +100

This works for me in Firefox and Chrome, in default settings (JSFiddle):

function popUnder(url, width, height) {
    var popUnderWin, nav = navigator.userAgent,
        isGecko = /rv:[2-9]/.exec(nav),
        hackString;

    hackString = nav.indexOf('Chrome') > -1 ? "scrollbar=yes" : "toolbar=0,statusbar=1,resizable=1,scrollbars=0,menubar=0,location=1,directories=0";

    popUnderWin = window.open("about:blank", "title", hackString + ",height=" + height + ",width=" + width);

    if (isGecko) {
        popUnderWin.window.open("about:blank").close();
    }

    popUnderWin.document.location.href = url;

    setTimeout(window.focus);
    window.focus();
    popUnderWin.blur();
}

document.getElementById("asd").addEventListener("click", function() {
    popUnder("http://www.google.", 1024, 768);
}, false);

<div id="asd">click here</div>

I didn't manage to get it work without the hacky extra parameters to window.open, so there is something to them.

http://support.mozilla./en-US/questions/806756#answer-167267

They say that it isn't possible unless everybody goes to about:config and sets dom.disable_window_flip to false.

I am not aware of any code that bypasses this restriction but I think the other websites use something other than window.blur() and window.focus()

There is a similar article here

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