Examine source code of ClipFast

{
  "manifest_version": 2,
  "name": "ClipFast",
  "version": "1.2",
  "description": "Adds a 'Copy URL' button to copy any URL from the address bar.",
  "permissions": [
    "<all_urls>",
    "activeTab",
    "clipboardWrite"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon_16.png",
      "32": "icons/icon_32.png",
      "48": "icons/icon_48.png",
      "128": "icons/icon_128.png"
    },
    "default_title": "Copy URL"
  },
  "icons": {
    "16": "icons/icon_16.png",
    "32": "icons/icon_32.png",
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "share.html",
    "share.js",
    "qrcode.min.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b683bcb3-7078-46ca-8ccf-49c769221063}"
    }
  }
}