Examine source code of Fandom Enhance

{
  "manifest_version": 2,
  "name": "Fandom Enhance",
  "version": "1.3.0",
  "icons": {
    "128": "icon.png"
  },
  "description": "Removes bloat from any fandom.com wiki",
  "content_scripts": [
    {
      "matches": [
        "*://*.fandom.com/wiki/*",
        "*://*.fandom.com/*/wiki/*"
      ],
      "js": [
        "script.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "*://*.fandom.com/wiki/*",
        "*://*.fandom.com/*/wiki/*"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{62818d18-03a3-4ae9-bbe6-d7e7d8b03a0d}"
    }
  }
}