[tor-bugs] #30421 [Applications/Tor Browser]: Loading extension 'null': Reading manifest: Error processing background.persistent...

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#30421: Loading extension 'null': Reading manifest: Error processing
background.persistent...
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 Reporter:  cypherpunks  |          Owner:  tbb-team
     Type:  defect       |         Status:  new
 Priority:  Medium       |      Component:  Applications/Tor Browser
  Version:               |       Severity:  Normal
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
 Reviewer:               |        Sponsor:
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 in 8.0.9, new warning logged in the console:

 addons.webextension.<unknown>        WARN        Loading extension 'null':
 Reading manifest: Error processing background.persistent: Event pages are
 not currently supported. This will run as a persistent background page.

 also:

 addons.webextension.{73a6fe31-595d-460b-a920-fcc0f8843232}      WARN
 Loading extension '{73a6fe31-595d-460b-a920-fcc0f8843232}': Reading
 manifest: Error processing background.persistent: Event pages are not
 currently supported. This will run as a persistent background page.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30421>
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