Examine source code of SPA Overrides

{
  "manifest_version": 3,
  "name": "SPA Overrides",
  "author": "The0x539",
  "homepage_url": "https://github.com/The0x539/spa-overrides",
  "version": "1.0",
  "description": "A lightweight tool for making microfrontend substitutions.",
  "icons": {
    "128": "icon.svg"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "install-devtools.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    }
  ],
  "action": {
    "default_icon": "icon.svg",
    "default_title": "SPA Overrides",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9012bb11-adcd-4233-8d48-6a0257aac7c1}"
    }
  }
}