Examine source code of Manga Colorizer

{
  "name": "Manga Colorizer",
  "version": "0.2.0",
  "description": "Bringing mangas to life",
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://*.manganelo.tv/*",
    "https://chapmanganelo.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.manganelo.tv/chapter/*",
        "https://chapmanganelo.com/*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/ext-icon.png"
      ],
      "matches": [
        "https://*.manganelo.tv/*",
        "https://chapmanganelo.com/*"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "assets/ext-icon.png",
      "24": "assets/ext-icon.png",
      "32": "assets/ext-icon.png"
    },
    "default_title": "Manga Colorizer Configuration",
    "default_popup": "popup.html"
  },
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "podmnbmloedpbinitcmjepigdkbjbjrg@xodalg.com"
    }
  }
}