Enables the download of high-resolution PNG images from a DRM-protected SmartFrame image.
That being said, many SmartFrame-protected images - such as many of those in the coventry.digital archive and in Historic England's Aerial Photo Explorer remain under no copyright, yet are protected.
I am not responsible if you do something illegal (in whatever jurisdiction you live in) with this code. I am merely underlining the ineffectiveness of any DRM like this, and underlining the fact that many copyright-free photos are arbitrarily protected.
The main file is tampermonkey.js, which is the code for the Tampermonkey script. Many detailed tutorials explaining how to install a Tampermonkey script can be found online.
The script will display a nice button if a smart-frame is detected, and clicking it will download the image. Note that it will refresh the page and take a few seconds for the image to actually download — but it will download nonetheless.
This project is under the MIT License.