Examine source code of Image Converter

{
  "manifest_version": 2,
  "name": "Image Converter",
  "author": "AurorisNet",
  "homepage_url": "https://github.com/auroris/ImageConverter",
  "version": "1.1",
  "description": "Convert and save images as JPG or PNG",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "Image Converter"
  },
  "web_accessible_resources": [
    "icons/*.png"
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1da3dcfd-7961-446e-b28a-bc6fd81b7ae8}"
    }
  }
}