10 Jul

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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Firefox caching iframe data by


Ex-code monkey turned entrepreneur, marketer, blogger, and speaker. TaeWoo founded Growth Genius, a DIY viral marketing/growth hacking platform. TaeWoo writes about online marketing and growth hacking. You can read more about him here.

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9 thoughts on “Firefox caching iframe data

  1. 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.

  2. 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?

  3. 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;

  4. Pingback: Firefox IFRAME caching

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