SUMMARY On every page, it creates a message in the console saying: Failed to get subsystem status for purpose Error: Conduits:RuntimeMessage: message reply cannot be cloned. sendMessage moz-extension://769df2f3-8400-4995-b883-69da69887dac/content-utils.js:47 c STEPS TO REPRODUCE 1. install extension 2. open webpage, view console OBSERVED RESULT message in console as above EXPECTED RESULT no message in console SOFTWARE/OS VERSIONS Windows: 2004; 80.0b8 ADDITIONAL INFORMATION I do realise that this extension is meant for Linux, just it auto syncs with firefox.