Examine source code of Link Extractor

{
  "name": "Link Extractor",
  "description": "Easily extract all links/domains from tabs/text with optional filters. Allows opening, copying, sorting, downloading, and more...",
  "homepage_url": "https://link-extractor.cssnr.com/",
  "author": "Shane",
  "version": "0.7.9",
  "manifest_version": 3,
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description": "Show Main Popup Action"
    },
    "extractAll": {
      "suggested_key": {
        "default": "Alt+Shift+X"
      },
      "description": "Extract Links from Tab(s)"
    },
    "extractSelection": {
      "description": "Extract Links from Selected Text"
    },
    "copyAll": {
      "suggested_key": {
        "default": "Alt+Shift+C"
      },
      "description": "Copy Links from Tab(s)"
    },
    "copySelection": {
      "description": "Copy Links from Selected Text"
    }
  },
  "omnibox": {
    "keyword": "link"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "background": {
    "type": "module",
    "scripts": [
      "js/service-worker.js"
    ]
  },
  "options_ui": {
    "page": "html/options.html",
    "open_in_tab": true
  },
  "action": {
    "default_popup": "html/popup.html",
    "default_title": "Link Extractor",
    "default_icon": {
      "16": "images/logo16.png",
      "32": "images/logo32.png",
      "48": "images/logo48.png",
      "96": "images/logo96.png",
      "128": "images/logo128.png"
    }
  },
  "icons": {
    "16": "images/logo16.png",
    "32": "images/logo32.png",
    "48": "images/logo48.png",
    "96": "images/logo96.png",
    "128": "images/logo128.png"
  },
  "optional_permissions": [
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "link-extractor@cssnr.com",
      "strict_min_version": "112.0"
    },
    "gecko_android ": {
      "strict_min_version": "120.0"
    }
  }
}