Examine source code of Clutterboard

{
  "manifest_version": 2,
  "name": "__MSG_manifestExtName__",
  "version": "3.0.2resigned1",
  "default_locale": "en",
  "description": "__MSG_manifestExtDescription__",
  "author": "Clutterboard",
  "homepage_url": "https://clutterboard.com",
  "applications": {
    "gecko": {
      "id": "clutterboard@clutterboard.com"
    }
  },
  "icons": {
    "16": "static/images/manifest/16x16.png",
    "48": "static/images/manifest/48x48.png",
    "128": "static/images/manifest/128x128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "static/images/manifest/19x19.png",
      "38": "static/images/manifest/38x38.png"
    },
    "default_title": "__MSG_manifestBrowserActionButton__"
  },
  "content_scripts": [
    {
      "js": [
        "static/jscripts/libraries/jquery.js",
        "static/jscripts/libraries/hmac-sha256.js",
        "static/jscripts/libraries/mtr-datepicker/dist/mtr-datepicker.min.js",
        "static/jscripts/main.js",
        "static/jscripts/app/methods.js",
        "static/jscripts/app/content_scripts.js"
      ],
      "css": [
        "static/jscripts/libraries/mtr-datepicker/dist/mtr-datepicker.clutterboard-theme.min.css",
        "static/stylesheets/app/content_scripts.css",
        "static/stylesheets/app/content_scripts_firefox.css",
        "static/stylesheets/app/services.css"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "background": {
    "page": "app/templates/background.html"
  },
  "options_ui": {
    "page": "app/templates/options.html"
  },
  "permissions": [
    "cookies",
    "storage",
    "tabs",
    "activeTab",
    "contextMenus",
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    "manifest.json",
    "app/templates/options.html",
    "static/images/app/add-button-orange-100x39.png",
    "static/images/app/no-profile-image-80x80.png",
    "static/stylesheets/app/content_scripts.css",
    "static/stylesheets/app/content_scripts_firefox.css"
  ]
}