I just tested the extension and I can confirm that Flashblock only downloads and runs the content when the placeholder is explicitly clicked on. So, Wikipedia i

I just tested the extension and I can confirm that Flashblock only downloads and runs the content when the placeholder is explicitly clicked on. So, Wikipedia is wrong. ;) Edit: If I browse to an SWF directly, it does appear to load the content. If I create the SWF via SWFObject, it does not load until I explicitly click on the placeholder. That question is poorly worded. It's referring to blocking Flash cookies in general. Flashblock will not prevent the use of Flash cookies by applets that you allow to run.