Examine source code of Fast Hover Copy

{
  "manifest_version": 3,
  "name": "Fast Hover Copy",
  "version": "2.2.2",
  "description": "Blazing fast link copying by hovering and pressing Ctrl+C (Cmd+C on Mac).",
  "author": "hongducwb",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon.png"
  },
  "permissions": [
    "clipboardWrite",
    "storage",
    "activeTab",
    "scripting",
    "alarms",
    "downloads"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_icon": "icons/icon.png",
    "default_title": "Fast Hover Copy",
    "default_popup": "popup/options.html"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fast-hover-copy@fast-hover-copy",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/content.js"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "sounds/pop.mp3",
        "popup/donate.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}