Examine source code of Tater Jots

{
  "description": "An extension used to take timestamped notes on videos and easily revisit them",
  "version": "0.0.0.4",
  "name": "Tater Jots",
  "applications": {
    "gecko": {
      "id": "info@taterjots.com",
      "strict_min_version": "42.0"
    }
  },
  "icons": {
    "16": "tj16.png",
    "48": "tj48.png",
    "128": "tj128.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "tj48.png",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self' 'wasm-eval'; object-src 'self'",
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "css": [
        "content.styles.css"
      ],
      "js": [
        "contentScript.bundle.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage",
    "*://*.youtube.com/*"
  ],
  "web_accessible_resources": [
    "content.styles.css",
    "assets/img/tj128.png",
    "assets/img/tj48.png",
    "pages/components/img/tj25.png",
    "/pages/components/img/*",
    "*.png"
  ]
}