QR code issue is most likely due to LibreWolf silently denying Canvas access, you can enable it per-site: https://librewolf.net/docs/faq/#should-i-allow-canvas-access-how-do-i-do-it
Not sure about video conferencing.
QR code issue is most likely due to LibreWolf silently denying Canvas access, you can enable it per-site: https://librewolf.net/docs/faq/#should-i-allow-canvas-access-how-do-i-do-it
Not sure about video conferencing.
The good news is that in order to exploit the new vulnerability, the attacker first has to obtain kernel level access to the system somehow - by exploiting some other vulnerabilities perhaps.
The bad news is once Sinkclose attack is performed, it can be hard to detect and mitigate: it can even survive an OS reinstall.
A spreadsheet