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I have a longpoll running but when I open a new tab in Firefox, or minimize the browser the longpoll seems to time out!? However if I leave the tab selected, or make a new dedicated window with Firefox open it won't time out.

Does anyone have any thought or insight on this weird behavior? When minimzied/alternate tab does Firefox stop running JavaScript in those tabs?

By the way I'm using Firefox 3.6.

pipinghot
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  • FYI I FIGURED IT OUT. THE PROBLEM IS THAT THE JAVASCRIPT COULD NOT MANIPULATE THE DOM FOR SOME REASON WHEN TAB DID NOT HAVE FOCUS. – pipinghot Nov 20 '10 at 09:02
  • Really, you should post what kind of code you are running. Your comment seems to imply the script involves widget focus. – syockit Nov 21 '10 at 08:29
  • very useful information, +1 from me. – doug Nov 22 '10 at 19:45

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No, it does not stop running JavaScript. And It does not block you from modifying the DOM. I have an app that runss a poll on server (I have both synchronous and async transmission) and then updates the dom based on results. And if I am looking at the tab or nor, and even if the firefox 3.6 is minimized - it just works. I have just tested it (again), before posting this answer.

Even the javascript test tools like selenium (in javascript) that are manipulating the DOM are working without focus.

So please check your code, it probably does require focus on some tab or on some element (like syockit suggested). I belive that you have the firebug, and you can easily analyze and debug your javascript (if it is not obfuscated).

bartosz.r
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  • Perhaps I was too vague. More sepcifically, it blocked me from destroying a DOM node with a flash player in it then using SWFObject to load a new one in -- it couldn't load the new one. I'm not sure why. – pipinghot Nov 25 '10 at 20:19
  • Ohh, now it's more complicated, now you have a flash plugin on a page, and you are using SWFObject. Honestly, I do not know how it works. But, you can try two write some test cases in selenium, then you will have a specific scenario, and a simple test you can share with others. Have you tried looking the answer on Mozilla pages? Or in Mozilla Bug tracking tool. – bartosz.r Nov 26 '10 at 08:50