Firefox Support

[codedust]

This is a first step towards Firefox (WebApp) support. I didn't change the behavior of the Chrome extension, so it's still perfectly usable in Chrome.

Of course, this still needs some testing. Feel free to try it out and let me know of your experiences!

To register without installing Signal as a Firefox WebApp, we need an HTTP server (for ajax requests to work):

python3 -m http.server 8000

Next, open http://localhost:8000/index_mozilla.html and follow the instructions. Alternatively, you can also do a standalone registration.
It's always a good idea to have a look at the developer console (F12).

[janimo]

I am not affiliated with OWS but my opinion is that the chances of some of this going in would be much better if it were separated in many smaller pull requests, the most obvious ones being fixing the chromium checks in .js . Then the additional mozilla specific new files could be a single merged commit which would be easier to apply to a moving master branch.

[codedust]

@janimo You are right. I'll split this pr up into several smaller commits and close it afterwards.

[codedust]

This pull request is now split up into the pull requests #592, #593, #594, #595 and #596.

[gerdneuman]

@codedust Would be great if there was some info on https://github.com/WhisperSystems/Signal-Desktop/blob/master/CONTRIBUTING.md on how to start Contributing for Firefox 😃 Really looking forward to this!

[codedust]

@gerdneuman 👍 At the moment I'm waiting for feedback by @liliakai. Adding some info to the contributing file would be a good idea after the initial pull requests get merged.

[r-a-y]

Firefox Apps no longer work as of Firefox 48:
https://support.mozilla.org/en-US/kb/runtime

Given that Chrome Apps are also being phased out (#871), it might make sense to port the Chrome App to a Chrome extension and then use Firefox's WebExtension API to port to Firefox.