This extension claims to be trans-friendly, but in reality it is very transphobic. It specifically targets transmasculine and nonbinary people, and anyone who supports them.

There have been targeted hate campaigns against trans people, using this extension as their tool to do so. And when someone doesn't like a trans person, they mass-flag them as a means of social isolation and bullying, while mass-greening the transphobe to trick anyone on the outside looking in.

The developers are in support of the harassers because they do not value transmasculine or nonbinary people, and believe it is impossible for someone to be bigoted against those groups.

I highly recommend not using this extension. It is a tool for transphobes, bullying, and social control among individual groups.