Examine source code of Link Cleaner

{
  "manifest_version": 2,
  "name": "Link Cleaner",
  "description": "A simple addon to clean links of redirects",
  "version": "1.0.2",
  "permissions": [
    "contextMenus",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "linkcleaner.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@linkCleaner-lucknell"
    }
  },
  "icons": {
    "125": "button/icon.png"
  },
  "browser_action": {
    "default_icon": {
      "125": "button/icon.png"
    },
    "default_title": "Link Cleaner"
  }
}