Blocked: Storage access requests from trackers

Firefox:

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

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.

• Content blocking on support.mozilla.org
• The crossorigin attribute