Extension console "TypeError: Cannot read property 'title' of undefined ... messaging.js:285"

[gorhill]

Error in response to tabs.query: TypeError: Cannot read property 'title' of undefined
    at chrome-extension://fgjjjafegkdpobkeamjaffenndaofnoo/js/messaging.js:285:59
    at Object.vAPI.tabs.get.onTabReceived [as callback] (chrome-extension://fgjjjafegkdpobkeamjaffenndaofnoo/js/vapi-background.js:126:9)
    at Object.vAPI.tabs.get (chrome-extension://fgjjjafegkdpobkeamjaffenndaofnoo/js/vapi-background.js:128:17)
    at onMessage (chrome-extension://fgjjjafegkdpobkeamjaffenndaofnoo/js/messaging.js:284:23)
    at vAPI.messaging.onPortMessage (chrome-extension://fgjjjafegkdpobkeamjaffenndaofnoo/js/vapi-background.js:320:13)

These were changes brought for FF on Android.

The callback passed to vAPI.tabs.get can be called with an undefined/null value for the tab. The code needs to be ready to deal with this.