I use its userscript version which work perfectly on Waterfox 56.5

SIIP

It works on websites that doesn't allow you to right click on it, this is what I've been searching for. Thank you!

牛逼。操作简单瞬间解决问题

I was unable to save images on some websites. After trying various extensions to download the images, I realized that "the problem" was the website was blocking right clicks! What a cheap trick! Based on a sample of 1, this extension seems to solve my problem.

🦊🦊🦊🦊🦊

Is perfect. Works on all websites and those results are nice!!