That was weird...

Yesterday I took a LinuxFoundation exam in their proprietary PSI browser. I took it on a freshly installed latest LinuxMint.

Due to the obvious reasons, PSI asked me to shut down the following currently running applications:
- chrome
- dropbox
- shutter
- Mail.ru

wat da fak?

I closed the first 3. Mail.ru remained

wtf???

Anyone's got a CKA certificate (Certified Kubernetes Admin)? I'm considering taking the course and getting certified, but a quick search on the internet scared me a little. The course and exam aren't that bad, but the experience of the PSI browser the exam must be taken in apparently is awful: it's a lottery whether it'll work or not, even a passing precheck test does not guarantee anything. People are setting up separate OS installations just for the exam.
Others say that their laptops cannot be used for the exam because of dual-gpu (even on windows).

This sounds like a nightmare.

I'm on LinuxMint 20.3 and I'm actually considering a separate installation of clean ubuntu.

I wonder, has anyone tried taking it? What's the experience? Has anyone tried taking the exam using a Linux (ubuntu?) live-boot?