Examine source code of wikihelper

{
  "manifest_version": 2,
  "name": "wikihelper",
  "version": "0.2",
  "description": "Help editing Catalan Wikipedia",
  "browser_specific_settings": {
    "gecko": {
      "id": "cawikihelper@willavery.net",
      "strict_min_version": "110.0"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "chrome_style": true
  },
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "tabs",
    "*://ca.wikipedia.org/*",
    "*://ca.m.wikipedia.org/*",
    "*://www.wikidata.org/*",
    "*://www.iucnredlist.org/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://ca.wikipedia.org/*",
        "*://ca.m.wikipedia.org/*"
      ],
      "js": [
        "draggable.js",
        "catalanext.js"
      ]
    },
    {
      "matches": [
        "*://www.iucnredlist.org/species/*"
      ],
      "js": [
        "iucnext.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "getoptions.js",
      "bgwikiext.js"
    ]
  }
}