Default linux works too ofc, I didn’t know they took that route.
Most other browsers have very specific useragents, so the main pool of same useragents will be hardened browsers anyway.
Thank you for checking
edit: github.com/…/0001-Set-Tor-Messenger-preferences.p… would indicate it should be Windows, Ill check later.
Try it with high security settings in tor, it might be something like canvas. Did you enable any permissions for the website?