This seems like a great idea, but Microsoft Windows is full of security holes and suffers from Windows Rot. Using a Linux desktop instead (Mint, Ubuntu, etc.) makes Firefox FLY! Plus Linux doesn't need antivirus programs to make it laggy because Linux doesn't get viruses. It would be great if this worked with a Linux-based Firefox installation. Fortunately, there are similar addons which work in Firefox no matter which OS one uses. But, CaptureSaver might be better.