I just downloaded the newest version of Brave and am unable to log in to protonmail.com using it. Protonmail sends me to a screen that says it is only compatible with browsers supported by PRNG and Web Storage:
For some reason it’s not working for me. I’m using MacOS High Sierra Version 10.13.6. I was was able to log in as expected before the latest update but I was using a quite old version of Brave. I actually encountered this problem with previous updates so kept using my old version of Brave instead of updating. I only updated now because Brave is no longer supporting the version I was using.