An example of the mandatory measures of Microsoft edge browser tracking prevention

Microsoft Edge The first component of the trace prevention function in is classification . In order to classify online trackers and group them ,Microsoft Edge Use the disconnected open source tracking protection list , That is to say Disconnect open source tracking protection lists.

These lists are available through “ Trust protection list ” Component supply , This component can be used in edge://components View in .

After downloading , The list is stored on disk , Developers can use them to identify specific URL Whether or how to classify .

In order to determine a URL Whether it is Microsoft Edge The classification system in is regarded as a tracker , The system will check a series of host names , Start with exact match , Then continue to check the partial match of up to four tags outside the top-level domain .

Example ： If we have the following url：
https://a.subdomain.of.a.known.tracker.test/some/path

The following hotname Will be test ：

• a.subdomain.of.a.known.tracker.test
• of.a.known.tracker.test
• a.known.tracker.test
• known.tracker.test
• tracker.test

If any of these hostname matches the hostname in the disconnect list ,Microsoft Edge Enforcement measures will continue to be evaluated to prevent users from being tracked .

To prevent tracking operations on the network ,Microsoft Edge Two mandatory measures have been taken for the classification tracker ：

• Restrict storage access - If a known tracking resource attempts to access any that may try to retain user data Web Storage ,Microsoft Edge Will block this access . This includes restricting the tracker from getting or setting cookie And visit IndexedDB and localStorage Isostorage API The ability of .

• Prevent resources from loading - If the website is loading known tracking resources ,Microsoft Edge The load may be blocked before the request reaches the network , It depends on the compatibility effect of the load and the tracking blocking setting set by the user . Blocked loading may include tracking scripts 、 Pixels 、iframe etc. . This prevents any data that might be sent to the tracking domain , It may even improve loading time and page performance as a side effect .

The most typical behavior , It is initiated by the application HTTP request , By Edge prevent , Return error message ：
net::ERR_BLOCKED_BY_CLIENT, As shown in the figure below ：