Unless they implement a feature to see what post/reasoning was used to justify the red label, and importantly with sources, then this is only going to be a hindrance to have installed if you want to find non-bigoted people. It's wrong worryingly often.

Unless you talk exclusively about issues relevant to transfemmes, then you're marked as transphobic. They're also way too quick to flag transfemmes as green just for simply being trans, often transmedicalists (aka people who think you're only "allowed" to be called trans if you get full gender affirming care, with all the gender affirming surgeries + HRT) will slip through and be green.

Likely that the people controlling it have serious biases against transmasc and enby people. That or the extension is entirely unmoderated, and has become compromised by automation/people doing false marks.