Extend the list of attestations required to use this API to address known undesirable consequences of cross-context transfer of information.

• If this API is used to place an ad on a web page, the caller attests that they will take commercially reasonable measures to require that the URL of the web page is reported to the advertiser. Limit the incentives for intermediaries to monetize pages seen as out of policy or brand-unsafe by advertisers, which often drive traffic using deceptive browser extensions, other malware, spam and other methods that present privacy risks to users.

• The caller attests that data from this API will not be used in conjunction with data obtained using unintended identification techniques such as browser fingerprinting. Unintended identification techniques, as defined in Mozilla's "Anti tracking policy" are not easily controllable by the user. (see discussion at UX is misleading #265)