Examine source code of Better Cr

{
  "manifest_version": 2,
  "name": "Crunchyroll With Better Seasons",
  "description": "Instead of having multiple seasons as DUBS, change audio language directly from the episode.",
  "version": "0.5.0",
  "author": "Dragicafit",
  "icons": {
    "48": "src/icons/icon.svg",
    "96": "src/icons/icon.svg"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://static.crunchyroll.com/*"
  ],
  "background": {
    "scripts": [
      "src/background-scripts/background.bundle.js"
    ]
  },
  "web_accessible_resources": [
    "src/web-accessible-resources/tab.bundle.js"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://static.crunchyroll.com/vilos-v2/web/vilos/player.html*"
      ],
      "js": [
        "src/content-scripts/crunchyrollVideoPlayerV2.js"
      ],
      "css": [
        "src/content-scripts/crunchyrollVideoPlayer2.css"
      ],
      "all_frames": true,
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://beta.crunchyroll.com/*"
      ],
      "js": [
        "src/content-scripts/injectInTab.js"
      ],
      "all_frames": false,
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{deb62188-8a8c-454b-ad57-a3ec587c2d4e}"
    }
  }
}