Examine source code of OurStickys - Sticky Notes on every page

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "short_name": "__MSG_extShortName__",
  "description": "__MSG_extDescription__",
  "author": "Fabrizio Parrella",
  "version": "0.1.99",
  "default_locale": "en",
  "browser_action": {
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "16": "/img/icons/note16.png",
    "20": "/img/icons/note20.png",
    "24": "/img/icons/note24.png",
    "32": "/img/icons/note32.png",
    "48": "/img/icons/note48.png",
    "64": "/img/icons/note64.png",
    "128": "/img/icons/note128.png",
    "256": "/img/icons/note256.png",
    "512": "/img/icons/note512.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*",
    "identity",
    "contextMenus"
  ],
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "/css/notes.css",
        "/css/themes.css"
      ],
      "js": [
        "/js/globals.js",
        "/js/classes/wrapper.js",
        "/js/classes/settings.js",
        "/js/classes/draggable.js",
        "/js/classes/resizable.js",
        "/js/classes/stickys.js",
        "/js/classes/sticky.js",
        "/js/classes/send.js",
        "/js/helper.js",
        "/js/functions.js",
        "/js/lib/xpath.js",
        "/js/lib/uri.js",
        "/js/lib/notes.js",
        "/js/lib/onpage.js",
        "/js/lib/urlize.js",
        "/js/lib/storage.js",
        "/js/lib/settings/info.js",
        "/js/lib/settings/channels.js",
        "/js/lib/settings/shares.js",
        "/js/lib/settings/tags.js",
        "/js/lib/settings/themes.js",
        "/js/lib/settings/password.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    "img/*.png",
    "img/*.gif"
  ],
  "commands": {
    "add-sticky": {
      "description": "Add Sticky",
      "suggested_key": {
        "default": "Alt+Shift+S",
        "windows": "Alt+Shift+S",
        "mac": "Command+Shift+S",
        "chromeos": "Alt+Shift+S",
        "linux": "Alt+Shift+S"
      }
    }
  },
  "applications": {
    "gecko": {
      "id": "{980500da-0b6d-4de9-ad90-93d17605276c}",
      "strict_min_version": "48.0"
    }
  }
}