Blocked: Storage access requests from trackers

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Message

Firefox:

CookieBlockedTracker=Request to access cookies or storage on “X” was blocked because it came from a tracker and content blocking is enabled.

What went wrong?

A request to access cookies or storage was blocked because the browser identified it as coming from a tracker and content blocking is enabled.

The permission can be changed or removed by:

  • Going to Preferences > Content Blocking and either
    • adding an exception with the Manage Exceptions… button
    • choosing the Custom Content Blocking and unchecking the Tracker checkbox

If the blocked resource doesn't need authentication, you can fix the warning message by adding a crossorigin="anonymous" attribute to the relevant element.

See also