Examine source code of Bold Text Extractor

{
  "manifest_version": 2,
  "name": "Bold Text Extractor",
  "version": "1.0",
  "description": "Extracts all bold text from the current page.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bold-text-extractor@yourdomain.com",
      "strict_min_version": "109.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon-48.png"
  }
}