It sounds like the only potential concern is a security one - where content
previously blocked at the site's request was no longer blocked. Is that
right? If so then I'd defer to security reviewers and approve from a web
compat perspective without any metrics.

Rick

On Wed, Feb 8, 2023 at 10:01 AM Yoav Weiss <[email protected]> wrote:

> Any use counters for when it is used?
>
> On Saturday, February 4, 2023 at 12:46:16 AM UTC+1 Carlos IL wrote:
> Contact [email protected]
>
> ExplainerNone
>
> Specificationhttps://www.w3.org/TR/mixed-content/#strict-checking
>
> Summary
>
> block-all-mixed-content is a CSP directive that causes Chrome to hard
> block all http resource loads on https sites. After the launch of
> autoupgrades for passive mixed content, the directive is a no-op since
> passive (image, video, and audio) mixed content is autoupgraded to https
> before block-all-mixed-content is evaluated (and fails to load if not
> available over https), and active mixed content is hard blocked by default.
> block-all-mixed content still has an effect when a user has allowlisted a
> site (using the "Insecure Content" site setting toggle) to allow mixed
> content, but that is a fairly niche use case (and it seems unlikely that
> sites are relying on that functionality).
>
> So this can have a visible effect when users explicitly allow mixed
> content *and* the site is trying to prevent that? And the effect in this
> case would be that the mixed content resources are not broken?
>
> block-all-mixed-content was previously defined in the MIX spec, but was
> marked as obsolete when MIX and MIX2 were merged and the concept of
> autoupgrades was introduced. It is already marked as deprecated in MDN docs.
>
>
> Blink componentBlink>SecurityFeature>MixedContent
> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ESecurityFeature%3EMixedContent>
>
> Motivation
>
> block-all-mixed content is already marked as obsolete in the Mixed Content
> spec, is a no-op in most cases, and removing it would simplify Chrome's
> mixed content handling code.
>
>
> Initial public proposal
>
> TAG review
>
> TAG review statusNot applicable
>
> Risks
>
>
> Interoperability and Compatibility
>
>
> The spec change that made this directive obsolete went through comments in
> webappsec and has already been merged to the spec (since 2020)
>
> *Gecko*: No signal
>
> *WebKit*: No signal
>
> Did other vendors ship this? If so, are they planning to unship it?
>
>
> *Web developers*: No signals
>
> *Other signals*:
>
> WebView application risks
>
> Does this intent deprecate or change behavior of existing APIs, such that
> it has potentially high risk for Android WebView-based applications?
>
>
>
> Debuggability
>
>
>
> Is this feature fully tested by web-platform-tests
> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
> ?No
>
> Flag name
>
> Requires code in //chrome?False
>
> Estimated milestones
>
> No milestones specified
>
>
> Link to entry on the Chrome Platform Statushttps://chromestatus.com/
> feature/5199363708551168
>
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>

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