[Nightly] Add-on broken

[Halibut80]

SyntaxError: An invalid or illegal string was specified bootstrap.js:385
In any repo.

Win 8.1 x64, FF Nightly 50.a1 x64 BuildID:20160522030240, e10s disabled.

[mzso]

Oh, well. By now it's broken on every channel.

[Noitidart]

I'm willing to collaborate to remake this as a hybrid webextension. (bootstrap only used to install the addon)