Honestly, I don't think I'll stop using this addon anytime soon, it's too useful. I can't really always be on the lookout for transphobia, I'm not going to stalk through everyone's twitter to know what they think about trans people, so this extension has been valuable for that reason. It's good to know who to *investigate* ... aaand that's my problem with the extension. It's only good for showing that the user marked red is very *likely* outwardly transphobic. It's not a guarantee.

I've seen transmisogynists be marked green. As in, radical feminists who dehumanize and misgender trans women, actual fascists, the like. On top of that, I'm seeing people who wouldn't misgender me or push for transphobia get marked red (intersex people, for one?) + users who have harassed trans women be marked green. I am legitimately wary of those who are marked green due to this, and have to investigate them on top of those marked red.

So if you use this extension, keep this in mind. Someone who's marked red might be trans-friendly, someone who's marked green might not be. Look for any dogwhistles on their page, as those are more telling than just being marked red.