Empathy test for color blindness and visual impairment. This add-on emulates 8 types of color blindness, plus grayscale to check the contrast of your website.
This plugin has come in handy when testing websites. I agree with another reviewer that being able to move the menu as well as keeping it displaying even after tapping on page. Update these two and I’ll update my review to 5 stars.
Works for most web sites I tested and even mockups (e.g. Invision). One annoying thing is that you can’t move menu which overlays part of the screen – pls fix to get 5 starts 🙂