Examine source code of Framed!

{
  "manifest_version": 2,
  "name": "Framed!",
  "version": "2025.4.13.1",
  "author": "Jonas Hellström (SHELLSTRÖM)",
  "description": "This tool grants you the power to add a custom border to visually separate different web hosts",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Framed",
    "default_icon": "icon16.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "browser-polyfill.min.js",
        "framed.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "webRequest"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "framed@shellstrom.se"
    }
  }
}