Examine source code of low—web

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "0.0.13",
  "default_locale": "en_US",
  "web_accessible_resources": [
    "options.js",
    "players/*",
    "images/*",
    "oembed/*",
    "lists/*"
  ],
  "icons": {
    "32": "icons/favicon-48.png",
    "48": "icons/favicon-48.png",
    "96": "icons/favicon-96.png",
    "128": "icons/favicon-128.png"
  },
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://github.com/lowwebtech/low-web-extension",
  "short_name": "low-web",
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; default-src 'self'",
  "author": "lowwebtech",
  "applications": {
    "gecko": {
      "id": "{ab9c153a-f2ef-4134-9675-97498ccc160f}"
    }
  },
  "browser_action": {
    "browser_style": false,
    "default_title": "low—web",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "32": "icons/favicon-32.png",
      "48": "icons/favicon-48.png",
      "96": "icons/favicon-96.png",
      "128": "icons/favicon-128.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content_script.js"
      ],
      "css": [
        "content_script.css"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ]
}