Examine source code of NoTube-Jutsu

{
  "manifest_version": 2,
  "name": "NoTube-Jutsu",
  "version": "1.4.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "NoTubeJutsu@extension.com"
    }
  },
  "description": "Ne voyez plus ce que vous ne voulez pas voir :)",
  "homepage_url": "https://gitlab.com/Raymondaud.Q/notube-jutsu",
  "icons": {
    "32": "icons/eye-slash-32x32.png",
    "48": "icons/eye-slash-48x48.png",
    "96": "icons/eye-slash-96x96.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "webNavigation"
  ],
  "browser_action": {
    "default_icon": "icons/eye-slash-48x48.png",
    "default_title": "NoTube-Jutsu",
    "default_popup": "popup/notubejutsu.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content_scripts/cleaner.js"
      ]
    }
  ]
}