Blur all images in Safari, unless clicked

I know that the 'Develop' menu allows me to block all images in Safari, however I have a couple more requirements:

• Blur, not block, all images from all webpages


• Click to show blurred images

I don't like to see images by default, yet still want to retain the ability to selectively 'unhide' them. Blurring the image makes the selection process (of which to show) much easier.

Is there a way to do this in Safari? Perhaps as an extension?

As a bonus, if there is a way to whitelist a set of images or sites (e.g.: the voting buttons in Stackexchange), that would be great.