Needs an update, it's been useless on Tumblr ever since they changed the way user urls are formatted from 'user dot tumblr dot com' to 'tumblr dot com slash user'. Now you can't mark profiles and they no longer show up as green or red. Works well for other sites though.

I recommend you, human rights activists, to install this extension if you stand for trans people.

This is a lovely extension! super helpful to identify trans friendly people as well as terfs/GCs. As a trans person on twitter this is necessary.

a wonderful tool for spotting transphobes, absolutely recommend!

Need to know whether someone's transphobic at a glance? Well this is the extension for you! Named after the Shinigami Eyes from Death Note, this extension will reveal the truth about internet users, celebrities, and the like, in this case whether they are transphobic. By default trans allies are labeled in green, and transphobes in red, and the colors are configurable if that doesn't work for you. Very useful if you're planning on following someone on social media, and want to make sure they're not transphobic first.

Note that the extension isn't perfect. Some users may be labeled incorrectly, and small users may still be unlabeled altogether, so it's sometimes helpful to check first. You can mark people yourself if you think the labels are wrong, however, and your labels will be sent to the central database so it can update for others.

Overall though, an incredibly important extension that you should install immediately. I'd love versions of this extension for other forms of bigotry.