Examine source code of SwarmTube

{
  "manifest_version": 3,
  "name": "SwarmTube",
  "version": "1.2.4",
  "description": "Extension bringing 7TV emotes to youtube comment section",
  "icons": {
    "16": "images/Icon16.png",
    "32": "images/Icon32.png",
    "64": "images/Icon64.png",
    "128": "images/Icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "src/scripts/emotes.js",
        "src/scripts/autocomplete.js",
        "src/scripts/picker.js"
      ]
    }
  ],
  "action": {
    "default_popup": "src/templates/popup.html"
  },
  "permissions": [
    "storage",
    "identity"
  ],
  "host_permissions": [
    "https://api.twitch.tv/*",
    "https://id.twitch.tv/*"
  ],
  "background": {
    "scripts": [
      "src/scripts/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "swarmtube@Igrolodz.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}