[tor-bugs] #33405 [- Select a component]: Bug in interaction between uMatrix and Snowflake (snowflake-webextension)

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#33405: Bug in interaction between uMatrix and Snowflake (snowflake-webextension)
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 Reporter:  cypherpunks  |          Owner:  (none)
     Type:  defect       |         Status:  new
 Priority:  Medium       |      Component:  - Select a component
  Version:               |       Severity:  Normal
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
 Reviewer:               |        Sponsor:
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 Error in Snowflake debug console, caused by a line in vapi-background.js
 in uMatrix:

 {{{Unchecked lastError value: Error: First-Party Isolation is enabled, but
 the required 'firstPartyDomain' attribute was not set.}}}

 The uMatrix setting causing this error is:

 {{{Spoof HTTP referrer string of third-party requests}}}, when set to
 true.

 This is a bug either in Snowflake, or uMatrix.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33405>
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