newtab:TypeError: activeView.getActiveView(...).firstChild is null
Stack trace:
Toolbar@resource://gre/modules/commonjs/toolkit/loader.js -> resource://635abd67-4fe9-1b23-4f01-e679fa7484c1/lib/main.js:1816:9
@resource://gre/modules/commonjs/toolkit/loader.js -> resource://635abd67-4fe9-1b23-4f01-e679fa7484c1/lib/main.js:62:21
evaluate@resource://gre/modules/commonjs/toolkit/loader.js:444:19
load@resource://gre/modules/commonjs/toolkit/loader.js:497:5
main@resource://gre/modules/commonjs/toolkit/loader.js:921:10
run@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/addon/runner.js:147:19
startup/</<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/addon/runner.js:87:9
Handler.prototype.process@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:937:23
this.PromiseWalker.walkerLoop@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:816:7
Promise*this.PromiseWalker.scheduleWalkerLoop@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:747:11
this.PromiseWalker.schedulePromise@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:779:7
this.PromiseWalker.completePromise@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:714:7
handler@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/addon/window.js:56:3
EventListener.handleEvent*EventTargetInterposition.methods.addEventListener@resource://gre/modules/RemoteAddonsParent.jsm:646:5
AddonInterpositionService.prototype.interposeProperty/desc.value@resource://gre/components/multiprocessShims.js:160:52
@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/addon/window.js:54:1
evaluate@resource://gre/modules/commonjs/toolkit/loader.js:444:19
load@resource://gre/modules/commonjs/toolkit/loader.js:497:5
_require@resource://gre/modules/commonjs/toolkit/loader.js:803:16
require@resource://gre/modules/commonjs/toolkit/loader.js:757:12
startup/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/addon/runner.js:72:21
Handler.prototype.process@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:937:23
this.PromiseWalker.walkerLoop@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:816:7
Promise*this.PromiseWalker.scheduleWalkerLoop@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:747:11
this.PromiseWalker.schedulePromise@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:779:7
this.PromiseWalker.completePromise@resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js:714:7
listener/<@resource://gre/modules/sdk/system/Startup.js:52:46
  main.js:1818
newtab:Logging load reason = startup  main.js:89
TypeError: self.port is undefined[Learn More]  panel.js:23:1