Examine source code of Abrami Trovo Emotes

{
  "manifest_version": 2,
  "name": "Abrami Trovo Emotes",
  "version": "1.1.2",
  "description": "Replaces text with emotes on trovo.live",
  "icons": {
    "128": "icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "abdeoulaa4@gmail.com",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "https://trovo.live/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://trovo.live/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "index.html"
  }
}