Examine source code of Javascript Control

{
  "author": "Erwan Ameil",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "description": "Add a button in the url bar to block or enable javascript per-site. Default is javascript disabled.\n",
  "homepage_url": "https://github.com/idlewan/javascript-control",
  "icons": {
    "128": "js.png"
  },
  "manifest_version": 2,
  "name": "Javascript Control",
  "page_action": {
    "browser_style": true,
    "default_icon": "js_disabled.png",
    "default_title": "Enable Javascript"
  },
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs"
  ],
  "version": "1.2resigned1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{591abe66-4392-4d7e-aad5-12f04be2539e}"
    }
  }
}