Examine source code of Streameta

{
  "manifest_version": 2,
  "short_name": "Streameta",
  "name": "Streameta",
  "version": "1.3.11",
  "description": "Automatically split highlights on Twitch from timestamps generated by Streameta. Publish those highlights automatically on YouTube.",
  "homepage_url": "https://streameta.com",
  "icons": {
    "16": "icons/favicon-16.png",
    "32": "icons/favicon-32.png",
    "48": "icons/favicon-48.png",
    "64": "icons/favicon-64.png",
    "128": "icons/favicon-128.png"
  },
  "permissions": [
    "https://*.twitch.tv/",
    "https://*.youtube.com/",
    "https://*.streameta.com/",
    "clipboardWrite",
    "clipboardRead"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.twitch.tv/embed/*/chat*"
      ],
      "all_frames": true,
      "js": [
        "content_scripts/twitch-prediction.js"
      ]
    },
    {
      "matches": [
        "https://*.streameta.com/controller/"
      ],
      "js": [
        "content_scripts/streameta-controller.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/favicon-16.png",
      "32": "icons/favicon-32.png",
      "48": "icons/favicon-48.png",
      "64": "icons/favicon-64.png"
    },
    "default_title": "Streameta",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f82a6a2-8db9-4b74-9b5c-8f3e238dc870}"
    }
  }
}