Extension Toggle button frequently doesn't work in FF

Was doing some work tonight and thought I had caused the issue in my branch, but I'm able to replicate the issue on FF 41 going back to the merge of #88 when FF support was first introduced.

The majority of the time when I click the toggle, there is no exception info in the inspected windows console, or the FF add-on debugger. However, it does occasionally throw this exception.

I'm curious if any of the Firefox users are seeing this behavior. Probably only a few at this point since the extension has been unsigned for awhile.

JPM [error]   Message: Error: Couldn't find the worker to receive this message. The script may not be initialized yet, or may already have been unloaded.
  Stack:
    send@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/content/worker.js:83:1
button<.onClick@resource://gre/modules/commonjs/toolkit/loader.js -> resource://firefox-addon-at-ng-inspector-dot-org/lib/main.js:51:1
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
@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/ui/button/action.js:99:3
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
transform/next@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:36:24
filter/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:53:7
transform/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:43:29
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
transform/next@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:36:24
filter/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:53:7
transform/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/utils.js:43:29
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
create/<.onBuild/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/ui/button/view.js:155:1