Firefox caching iframe data

Ok this is a repost cuz of stinkin’ DreamHost.

If you have an auto-generated iframe from a javascript, and this iframe has dynamic data, FireFox (but not IE) wll cache your data. Even if you have

<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
META HTTP-EQUIV="Pragma" CONTENT="no-cache">

After days of pulling out my hair (or what little I have left), i found out the only way around this is by calling this in your JavaScript:

iframe.src = iframe.src;

This basically forces the browsers to reload. Not the most efficient solution but it works. Also, I haven’t tested to see if I could remove this with FireFox 3 coming out but no matter. The rest of the world is gonna take 1-2 years to download FF3 anyway.

PS: Hairloss is not due to masturbation. Thank god for that.

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Ex-code monkey turned entrepreneur, marketer, blogger, and speaker. TaeWoo writes about online marketing and growth hacking. You can read more about him here.

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  • Alien Y September 22, 2008 at 3:36 am

    hello, I have the same problem,
    do you have full code about this ?


  • taewoo September 23, 2008 at 12:48 pm

    Hey Alien Y.
    I basically posted the solution.. read again

  • QDawg December 3, 2008 at 7:02 pm

    I have a similar issue, only my iframe is dynamically passing data to the parent frame. Any idea how I can prevent the iframe from passing that data before it is loaded.

  • taewoo December 11, 2008 at 1:06 pm

    QDawg: You can try “onload” function within the iframe.

  • Son Nguyen June 1, 2009 at 12:38 pm

    I experience the same with FireFox 3, even with the src refresh/force. But the weird thing is enable Firebug (a Firefox add-on) and the problem goes away. But can’t expect any regular visitors to install Firebug. I guess Firebug does alter the data loading sequences. Any clue?

  • Colin June 17, 2009 at 9:24 am

    Thanks so much! I modified thickbox to deal with this

    thickbox.js around like 197:

    }else{//iframe modal
    $(“#TB_window”).append(” “);
    // fix for firefox iframe caching
    var iframe = $(“#TB_iframeContent”)[0];
    iframe.src = iframe.src;

  • Margaret October 1, 2010 at 5:02 pm

    Dear God, thank you for taewoo

    • taewoo October 3, 2010 at 10:15 am

      yes, i am sent from God. ;)

One Trackback

  • By Firefox IFRAME caching on August 22, 2009 at 2:00 am

    [...] is a great post on the internet that gives a work around for iframes that are being cached. In my situation [...]

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