Examine source code of dopeChat

{
  "manifest_version": 2,
  "name": "dopeChat",
  "version": "1.4.4",
  "description": "Custom emotes, chat tweaks",
  "icons": {
    "128": "icon64.png"
  },
  "permissions": [
    "storage",
    "https://emxllayyisdskjtscvck.supabase.co/rest/v1/useremotes?select=*"
  ],
  "web_accessible_resources": [
    "css/*",
    "images/*",
    "icon64.png"
  ],
  "browser_action": {
    "default_icon": "icon64.png",
    "default_title": "dopeChat",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "*://*.facebook.com/*videos/*"
      ],
      "js": [
        "js/contentScript.js",
        "js/emoteMenu.js"
      ],
      "css": [
        "css/content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "js/backgroundPage.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "dopechat@dope",
      "strict_min_version": "57.0"
    }
  }
}