Fingerprints persist across private browsing "sessions"

Description of the issue:

Fingerprints persist across private browsing “sessions”

How can this issue be reproduced?

  1. Ensure that fingerprinting blocking is enabled (I used “strict” but the same may happen with “standard”).
  2. Open a private window.
  3. Visit https://browserleaks.com/canvas and note down the fingerprint signature.
  4. Close all private windows.
  5. Open a private window.
  6. Visit https://browserleaks.com/canvas and note that the fingerprint signature is the same as previously.

Expected result:

Since cookies saved in private windows are deleted when all private windows are closed, the user would expect closing all private windows to also change fingerprints accordingly.

Brave Version( check About Brave):

1.12.114

Additional Information:

This issue also seems to apply to guest windows.

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