It's a bit disingenuous to make such a claim. The bar is essentially the same since browsers execute all, 1st and 3rd-party JS by default. Loading a document is

It's a bit disingenuous to make such a claim. The bar is essentially the same since browsers execute all, 1st and 3rd-party JS by default. Loading a document is enough. For a web-browser it's quite rare to make requests without completing the transfer. The bar is essentially the same and the changes that privacy-invading 3rd party scripts have to do to bypass the Firefox's implementation are minimal, so Mozilla may as well not make any triumphant claims until this glaring issue is fixed.