Error
In the Firefox console, the message appears:
Failed to get subsystem status for purpose
Object { rejected: true, message: Error }
content-script.js:95:21
Failed to get subsystem status for purpose
Object { rejected: true, message: Error }
message: Error: Attempt to postMessage on disconnected port
columnNumber: 14
fileName: "moz-extension://0e923969-7c77-4f54-9f1b-6deafc5285cb/extension-utils.js"
lineNumber: 66
message: "Attempt to postMessage on disconnected port"
