Is Firefox really an appropriate default browser for Qubes?

[fsflover]

If you care about fingerprinting, you should read this topic:

Can websites track me across different qubes?

I would expect that disposable VMs in Qubes provide the same set of Firefox features for all Qubes users. Unless you modified your browser in some way (and unless screen resolutions are different), our fingerprints should just coincide. However, every time I check the fingerprinting in Qubes, I get the result that I am unique among millions (amiunique) / hundreds of thousands (panopticlick) of users. It happends both on Debian and on Fedora. How is this possible? Do you get the same results? We…