Examine source code of DataScraper

{
  "applications": {
    "gecko": {
      "id": "datascrapper@rakot.ru"
    }
  },
  "name": "DataScrapper",
  "version": "0.0.6resigned1",
  "manifest_version": 2,
  "description": "Extension for FF and Chrome to extract data from web pages to csv.",
  "homepage_url": "https://github.com/rakot/DataScrapper",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "src/bg/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icons/icon19.png",
    "default_title": "DataScrapper"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "tabs",
    "https://*/*",
    "http://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "js/vendor/jquery.min.js",
        "src/inject/inject.js"
      ]
    }
  ]
}