Examine source code of Twitch2Kick

{
  "manifest_version": 2,
  "name": "Twitch2Kick",
  "version": "0.7.4",
  "description": "Automatically switches from Twitch to Kick if the streamer switches the plattform.",
  "icons": {
    "48": "icons/iconttk48.png",
    "128": "icons/iconttk.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "config.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/iconttk48.png",
      "128": "icons/iconttk.png"
    },
    "default_title": "Twitch to Kick Switcher"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{945073ba-335c-440e-8fbb-d88c98e57803}"
    }
  }
}