Cookies already don't prompt, so I'm not sure that's the best comparison. In addition, while cookies can be created by one origin and read by another origin (a.

Cookies already don't prompt, so I'm not sure that's the best comparison. In addition, while cookies can be created by one origin and read by another origin (a.k.a. "third-party cookies", which Firefox has been trying to deprecate for a while now), this API is private to each origin, making it useless for cross-site tracking. As for disabling this, I assume these are the appropriate pages in the docs: https://support.mozilla.org/en-US/kb/storage https://support.mozilla.org/en-US/kb/storage https://support.mozilla.org/en-US/kb/block-websites-storing-cookies-site-data-firefox https://support.mozilla.org/en-US/kb/block-websites-storing-... .