Examine source code of Twitch Better Profile

{
  "icons": {
    "16": "icon16.plasmo.e7bcd3ac.png",
    "32": "icon32.plasmo.ce39377b.png",
    "48": "icon48.plasmo.3c17e113.png",
    "64": "icon64.plasmo.df317abe.png",
    "128": "icon128.plasmo.6a4310c5.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icon16.plasmo.e7bcd3ac.png",
      "32": "icon32.plasmo.ce39377b.png",
      "48": "icon48.plasmo.3c17e113.png",
      "64": "icon64.plasmo.df317abe.png",
      "128": "icon128.plasmo.6a4310c5.png"
    },
    "default_popup": "popup.html"
  },
  "version": "0.2.0",
  "author": "Daniel Reis. <danielhe4rt@gmail.com>",
  "name": "Twitch Better Profile",
  "description": "A new way to first interact with users on Twitch.",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "permissions": [
    "storage",
    "activeTab",
    "identity",
    "*://*.twitch.tv/*",
    "https://*.basementdevs.com.br/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://dashboard.twitch.tv/u/*/stream-manager",
        "https://www.twitch.tv/embed/*/chat*",
        "https://www.twitch.tv/*"
      ],
      "js": [
        "content.166f1fa0.js"
      ],
      "exclude_matches": [
        "*://*.twitch.tv/*.html",
        "*://*.twitch.tv/*.html?*",
        "*://*.twitch.tv/*.htm",
        "*://*.twitch.tv/*.htm?*"
      ],
      "all_frames": true,
      "css": []
    }
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{29688c78-7d19-4122-8315-bbb81ad15cb4}",
      "strict_min_version": "109.0"
    }
  }
}