I used it for many years. It used to be very good for telling if someone is more covert about their transphobia-
However, lately, the people doing all the rating and anybody who might be approving those ratings only seem to care only about discrimination against trans women, and nobody else. This extension was never for ONLY labeling transmisogyny, it was for transphobia as a whole.
Before anyone makes assumptions, I am not saying that transmisogyny is not a serious issue. It is very serious and you should defend your trans sisters. But it is not the only issue, and it is not the only focus of this extension.
Taken directly from the github: "This extension is focused on anti-trans (including anti-nonbinary) sentiment".
I have seen many people who are blatantly anti-nonbinary being flagged as "trans-friendly". I have seen people going as far as to say trans men should be killed flagged as "trans-friendly".

I will not deny that most people flagged as red deserve it, because it is true.
But lately, I have seen many people doing nothing but pointing out intersexism in trans communities get flagged as red, as well as people acknowledging that trans men also face discrimination (not even using that "transandrophobia" term which people seem to hate so much) flagged as red.
Trans women and trans men both face discrimination, which often presents itself in different ways. Trans women tend to be hyper visible (many anti-trans laws focusing on trans women, being afraid of "men" in women's restrooms, sports teams, etc., V-coding in prisons, and more), while trans men tend to be erased (deaths -often due to transphobic hate crimes - get labeled as femicide, reduced to "mentally ill women" or that they were "manipulated", correctively raped, the identities trans men throughout history get erased, and more). They are both serious issues, and both should be talked about.

I have also seen many very loud racists i have seen labeled "trans-friendly" purely because they also happen to be trans. The extension github also mentions something along this line- "Being transgender, having some decent minimum standard like "hurting people = bad", or supporting the overall LGBT community" is underneath the header "Not enough to mark as trans-friendly". Somebody who only has respect for specific groups of trans people should not be considered "trans-friendly"

I understand that proper moderation for this extension is tough if not outright impossible. But i am pretty tired of bad actors poisoning the well for seemingly no reason other than to cause infighting.

Also, not the most relevant, but I have also seen many people talk about purposefully flagging users as anti-trans over petty discourse (especially fandom-related) that has nothing to do with trans people or even LGBT issues as a whole. I would not be surprised if at least some of those flags have made it through to other users.
Because of this I started to feel it would be useful to have a function to submit WHY somebody is being flagged for whichever reason, though with more thought, that would likely only be abused as well if not properly moderated...