I just updated to the new Brave on April 20th 2019 browser as per the warning that the old browser version would stop functioning.
For my business I purchase postage through USPS via their “click and ship” interface. This requires a pop-up screen for printing postage. In the old browser, this functioned fine, but in the update, the PDF upload is blocked, so I can pay for but cannot print my postage. This will cause me to abandon Brave until this issue is resolved.
I wanted to add that the track pad crazy scrolling is finally fixed! It just does a funny slide now but doesn’t scroll to the bottom of all pages forever. That would be amazing if this didn’t block an important business function for me in the process!