Examine source code of Email Extractor

{
  "manifest_version": 2,
  "name": "Email Extractor",
  "description": "Select any element on a page and get email-safe inline HTML with table layouts. Free.",
  "version": "1.0.0",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "storage",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Email Extractor"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "Email Extractor"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "email-extractor@saasinsiders.com",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}