Thanks for sending the PSA, Chris.
On 5/20/25 7:00 PM, Chris Thompson wrote:
Hello blink-dev@ --
As part of our work on Local Network Access restrictions
<https://chromestatus.com/feature/5152728072060928>(which is
superseding a prior effort called Private Network Access
<https://chromestatus.com/feature/5737414355058688>), we will be
making some changes to the fetch option targetAddressSpace. While this
option technically shipped as part of work on the Private Network
Access mixed content permission
<https://chromestatus.com/feature/5954091755241472>, it was never
meaningfully web-exposed as Private Network Access' enforcement has
not shipped (only DevTools warnings). Sites that adopted this optional
tagging of fetch() calls should not be affected by this change.
Specifically, we are moving this fetch() option from being gated on
the "PrivateNetworkAccessPermissionPrompt" runtime enabled feature to
being gated on the new "LocalNetworkAccessPermissionPolicy" runtime
enabled feature (which is controlled by the base::Feature flag
"LocalNetworkAccessChecks"). As part of this change, we will also be
updating the values for the targetAddressSpaceoption to match the new
address space names, as described in our explainer
<https://github.com/explainers-by-googlers/local-network-access/blob/main/README.md#address-spaces>.
These changes will ship in Chrome 138.
The new Local Network Access feature will be ready for developer
testing soon, and we will share more details in a separate announcement.
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