Cis guy here (pardon the intrusion).
The validity of an argument is not decided by whether the person making it belongs to a minority. It’s such an awful failure of leftwing discourse to engage in all this identity-politics bullshit, when what counts should be the arguments. Like yours. Because it is good and correct! And not made worse by you being presumably cis. (And if you figure out one day that you aren’t and come back here, that is also fine and it doesn’t change the validity of the argument. And lived experience is not a substitute for data, because if we were to go by my lived experience there is essentially no transphobia in the Netherlands outside the healthcare system… (spoiler: there is!))
Sorry, this is just a pet peeve of mine. In short: You and your arguments are welcome with me!
Not using it, but AFAIK it uses a bloom-filter internally which is a datastructure that is known to come with unavoidable false positives. AKA: Even if the database was 100% free of errors and only contained actually transphobic people, the extension would still mark a lot of completely innocent accounts as transphobic, simply because the data-structure returns wrong results at times.
Based on that alone you should treat any and all results as “warrants a closer look” at most. With even that being a questionable use: People with dark skin are more commonly non-EU foreigners in Europe than white people, but every sane person agrees that the police checking dark skinned people more often is racial profiling, which is racist, should be illegal, and is just a bad thing to do. So taking a closer look at people because of something they cannot control that isn’t directly tied to them personally (skin-color or positive match in a bloom filter) is a questionable practice to begin with.
Lastly: What does it change? The validity of an argument is not affected by whether the person who made it is a transphobe or not.