Examine source code of ReColor

{
  "manifest_version": 2,
  "name": "ReColor",
  "version": "0.2resigned1",
  "description": "Allows you to change the colors used in any Web page with the colors you want.",
  "homepage_url": "https://github.com/i-tsvetkov/recolor",
  "author": "Итало Цветков",
  "icons": {
    "128": "128x128.png"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "permissions": [
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "config.js",
        "recolor.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fde58208-7a04-4bd5-8094-aff49ac4da51}"
    }
  }
}