Examine source code of Week Ly - Week number

{
  "name": "__MSG_appName__",
  "version": "1.2.5resigned1",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "short_name": "Week Ly number",
  "author": "Codarren Velvindron",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "https://raw.githubusercontent.com/codarrenvelvindron/Week-Ly/master/weeklyquote.json"
  ],
  "browser_action": {
    "default_title": "__MSG_appAction__",
    "default_popup": "popup.html",
    "default_icon": "icon16.png"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{5b4ecd88-bf26-4cbd-a965-af41eeda65f6}"
    }
  }
}