Yesterday I updated my system via APT and have a purebrowser upgrade. Since then, the browser can no longer correctly access the site www.youtube.com, loading only a "blank" page with non-clickable elements.
The last occurrence in "/var/log/apt/history.log" (obtained with the "less" command) is as follows:
Start-Date: 2019-09-21 10:50:03
Commandline: apt upgrade
Upgrade: purebrowser:amd64 (68.0.2esr-1pureos3, 68.1.0esr+really60.9.0esr-1~deb10u1pureos1)
End-Date: 2019-09-21 10:50:44
I uploaded a screenshot of purebrowser with the site www.youtube.com for illustration.
Disabling the "Privacy Badger" and "uBlock Origin" addons resulted in nothing different.