Examine source code of Mozilla Rally

{
  "description": "The Mozilla Rally extension for data collection",
  "author": "Mozilla",
  "name": "Mozilla Rally",
  "version": "0.6.0",
  "homepage_url": "https://members.rally.mozilla.org/",
  "options_ui": {
    "page": "public/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "idle",
    "webNavigation",
    "webRequest",
    "storage",
    "unlimitedStorage",
    "scripting",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://localhost/*",
        "https://members.rally.mozilla.org/*"
      ],
      "js": [
        "dist/main.content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "incognito": "not_allowed",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "attention-stream@rally.mozilla.org",
      "strict_min_version": "101.0"
    }
  },
  "browser_action": {
    "default_icon": "images/RallyFlag-green.png",
    "default_title": "Mozilla Rally"
  },
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "web_accessible_resources": [
    "dist/youtube/yt.injected.js"
  ]
}