I’m also based in the UK. I don’t run a business but have occasionally encountered problems trying to use Librewolf on the web, especially with Noscript on.
I tried to use Qubes to separate my activities into VMs but I found it difficult. So I did my own, less extreme, approach using KVM.
I created a virtual machine which only has Chrome on it. This is what I use for accessing my bank, Paypal and doing online shopping.
I have a second machine I use for Whatsapp and email and finally a third with Librewolf for general web browsing.
Each uses the same VPN service but different servers.
I only use Freetube and Retroarch on my main machine.
This is on a very beefy Thinkpad I essentially use as a desktop in my office. I use a smaller machine downstairs with VNC on it as a remote when I’m sat on my sofa.
It’s not that much work. I created a VM which is running the same distro as the host. I removed all of the apps except for the terminal. Then I cloned it for each VM I need.
The Whatsapp/ email client VM and the Librewolf VM start with my OS so it’s like having them in separate windows. The others I only start if needs be.