"No shady privacy policies or back doors for advertisers" proclaims the Firefox homepage, but that's no longer true in Firefox 128.
Less than a month after acquiring the AdTech company Anonym, Mozilla has added special software co-authored by Meta and built for the advertising industry directly to the latest release
I take it that you were referring to Mull (Browser) and not MullVad (VPN service).
Not sure what he meant BUT Mullvad does have a lil’ browsy boi.
https://mullvad.net/en/browser
Mull is a FF based browser for android. I am talking about Mullvad Browser for the desktop, which is FF and Tor fusion product.