Examine source code of Full Page Screenshot Pro

{
  "name": "Full Page Screenshot",
  "short_name": "Screenshot",
  "description": "An powerful tool to capture entire webpage or selected area and annotate inside editor",
  "offline_enabled": true,
  "version": "1.0.9",
  "manifest_version": 2,
  "author": "Rahul Baruri <rahulbaruri1@gmail.com>",
  "icons": {
    "16": "images/icons/16.png",
    "32": "images/icons/32.png",
    "48": "images/icons/48.png",
    "128": "images/icons/128.png",
    "256": "images/icons/256.png"
  },
  "background": {
    "scripts": [
      "/js/background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs",
    "storage",
    "unlimitedStorage",
    "<all_urls>",
    "file:///*",
    "http://*/*",
    "https://*/*",
    "ftp://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "ftp://*/*",
        "file:///*",
        "*://*/*"
      ],
      "js": [
        "/js/contentScript.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_icon": "images/icons/32.png",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "/css/injectable.css",
    "editor.html",
    "images/icons/32.png",
    "/js/contentScript.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5aaf0368-fc07-4a8d-b7ba-eb7d46380030}"
    }
  }
}