console.error: firefox-line:
JPM [error]   Message: TypeError: target.QueryInterface is not a function
  Stack:
    getFrameElement@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/window/utils.js:443:4
getFrame@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/input/frame.js:32:39
lift/</<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:163:28
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38

receive@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:115:5
InputPort.prototype.observe@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/input/system.js:100:5
ObserverParent.notify@resource://gre/modules/RemoteAddonsParent.jsm:347:9
ObserverParent.receiveMessage@resource://gre/modules/RemoteAddonsParent.jsm:337:9