[Webkit-unassigned] [Bug 274840] [WPE][GTK] Investigate AdvancedPrivacyProtections

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=274840

Michael Catanzaro <mcatanzaro at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mcatanzaro at redhat.com

--- Comment #1 from Michael Catanzaro <mcatanzaro at redhat.com> ---
This one line patch (for testing purposes only, not a serious patch) significantly improves our performance on https://coveryourtracks.eff.org/

diff --git a/Source/WebKit/UIProcess/API/glib/WebKitWebsitePolicies.cpp b/Source/WebKit/UIProcess/API/glib/WebKitWebsitePolicies.cpp
index fd2a94767aca..7c4b5cd3bec2 100644
--- a/Source/WebKit/UIProcess/API/glib/WebKitWebsitePolicies.cpp
+++ b/Source/WebKit/UIProcess/API/glib/WebKitWebsitePolicies.cpp
@@ -52,6 +52,7 @@ struct _WebKitWebsitePoliciesPrivate {
     _WebKitWebsitePoliciesPrivate()
         : websitePolicies(API::WebsitePolicies::create())
     {
+      websitePolicies->setAdvancedPrivacyProtections({ WebCore::AdvancedPrivacyProtections::BaselineProtections, WebCore::AdvancedPrivacyProtections::FingerprintingProtections });
     }
     RefPtr<API::WebsitePolicies> websitePolicies;
 };

We go from "Our tests indicate that you have some protection against Web tracking, but it has some gaps" to "Our tests indicate that you have strong protection against Web tracking."

The changes I see are:

 * Fake screen size
 * Canvas, WebGL, AudioContext fingerprints randomized by first-party domain

However, it all depends on API::WebsitePolicies. The GTK/WPE API website policies API probably needs to be deprecated and replaced, bug #259577.

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