Examine source code of mavanimes-fixes

{
  "manifest_version": 2,
  "name": "mavanimes-fixes",
  "version": "1.0.4",
  "homepage_url": "https://github.com/CamilleAbella/mavanimes-fixes",
  "description": "Fixes for mavanimes.co. Add a 'next episode' option in select HTMLElement.",
  "icons": {
    "48": "mavanimes-48.jpg",
    "96": "mavanimes-96.jpg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mavanimes.co/*"
      ],
      "js": [
        "fixes.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "mavanimes-48.jpg",
    "default_title": "mavanimes-fixes",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ]
}