Consider disabling "Uncloak canonical names" uBO setting
the Mullvad VPN DNS server will leak alongside the proxy DNS server when uBlock Origin Uncloak canonical name
options is enabled.
This uBO option is enabled by default in Mullvad Browser, which is why most users will observe it.
This is something which we were aware of and we warn about it in our help section and on the important notes of last release.
This can be considered a "mild" DNS leak, because since the socks proxy only work inside a Mullvad VPN tunnel, then the DNS leaked will be the one from the Mullvad server to which the server is connected.
At this point, I think while this is a Mullvad Browser Extension issue, it could be solved for Mullvad Browser by disabling "Uncloak canonical names" in uBO by default.
What do you think about it? Do you have another recommendation?