I tried #Matrix web clients on matrix.org by #Tor Browser with default settings.
https://matrix.org/ecosystem/clients/

Element     -- Worked!
Cinny       -- Not worked but with chromium via Tor, worked
FluffyChat  -- Not worked but with chromium via Tor, worked then consumed my CPU 100% f*ck why?
Quadrix     -- Worked! but I had to access https://app.quadrix.chat/ instead of https://quadrix.chat/ typo?
SchildiChat -- Worked!
Hydrogen    -- Worked!

#IRC is better for me than Matrix when text chat only. However, /kbin, torproject and other interesting orgs become to provide their support on Matrix so I fear that I lose the supports if I don’t use Matrix… Am I too afraid? 😟