Examine source code of 7TV

{
  "manifest_version": 2,
  "name": "7TV",
  "version": "3.1.22",
  "version_name": "3.1.22",
  "description": "Improve your viewing experience on Twitch & Kick with new features, emotes, vanity and performance.",
  "browser_specific_settings": {
    "gecko": {
      "id": "moz-addon-prod@7tv.app",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "options_ui": {
    "page": "index.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icon/icon-16.png",
    "48": "icon/icon-48.png",
    "128": "icon/icon-128.png"
  },
  "permissions": [
    "scripting",
    "storage",
    "activeTab",
    "*://*.twitch.tv/*"
  ],
  "optional_permissions": [
    "management",
    "*://*.youtube.com/*",
    "*://*.kick.com/*",
    "*://*.7tv.app/*",
    "*://*.7tv.io/*"
  ],
  "web_accessible_resources": [
    "site.js",
    "site.js.map",
    "content.js.map",
    "worker.js",
    "index.html",
    "assets/*"
  ],
  "browser_action": {
    "default_icon": "./icon/icon-128.png",
    "default_popup": "index.html#/popup?noheader=1",
    "default_area": "navbar"
  }
}