With NoScript installed on Firefox, clicks of the Upload button on the Insert Image, Insert Media, etc. pop-ups results in a NoScript potential ClickJacking warning which prevents the user from being able to upload the desired item. Indeed, the only way for the user to proceed is to switch to a different browser, disable ClickJacking detection under NoScript, disable NoScript altogether, or to clear the "Keep this element locked" checkbox on the warning pop-up before dismissing the pop-up and re-clicking the Cute Editor Insert pop-up Upload button. See screenshot below from the latest demo page using the most recent versions of Firefox and NoScript..