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Why does uploading images and video to Kickstarter not work on the new version of Mozilla Firefox?

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I am trying to upload images and videos to my Kickstarter page, which usually involves a little pop-up to upload your material, but it does not work on the newest version of Mozilla Firefox. I checked to see if pop-ups were "allowed" or "banned" on Kickstarter and it says they are "allowed." I am stumped.

I am trying to upload images and videos to my Kickstarter page, which usually involves a little pop-up to upload your material, but it does not work on the newest version of Mozilla Firefox. I checked to see if pop-ups were "allowed" or "banned" on Kickstarter and it says they are "allowed." I am stumped.

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I figured it out. I had to go to Tools > Add-ons, which opens up the Add-ons Manager, then I had to go to Plugins and enable Shockwave Flash 11.1.102.63. Apparently, Kickstarter uses some form of Shockwave or Flash to upload their material. The more you know!