Examine source code of Deviation

{
  "manifest_version": 3,
  "name": "Deviation",
  "version": "0.0.1",
  "description": "Redirect all YouTube URLs to alternative frontends",
  "icons": {
    "512": "src/assets/logo.svg"
  },
  "action": {
    "default_icon": {
      "512": "src/assets/logo.svg"
    },
    "default_popup": "src/popup/index.html"
  },
  "permissions": [
    "tabs",
    "scripting",
    "activeTab",
    "storage"
  ],
  "commands": {
    "open_alt_frontend": {
      "suggested_key": {
        "default": "Alt+J"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/main.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "src/backgrounds/setDefaultURL.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "deviation@dimitrichauvel",
      "strict_min_version": "109.0"
    }
  }
}