Examine source code of Extraneous

{
  "manifest_version": 2,
  "name": "Extraneous",
  "version": "1.10.2",
  "description": "Adds bloat to Invidious.",
  "permissions": [
    "storage",
    "*://inv.nadeko.net/*"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "dist/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "dist/background.js"
    ],
    "persistent": false,
    "type": "module"
  },
  "icons": {
    "48": "assets/logo.svg",
    "96": "assets/logo.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extraneous@sysrqmagician.github.io"
    }
  }
}