Examine source code of To Discord

{
  "manifest_version": 3,
  "version": "3.0.0",
  "name": "To Discord",
  "description": "Sends content to added discord channels",
  "default_locale": "en",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/ext_icon_16.png",
    "20": "icons/ext_icon_20.png",
    "32": "icons/ext_icon_32.png",
    "40": "icons/ext_icon_40.png",
    "48": "icons/ext_icon_48.png",
    "128": "icons/ext_icon_128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/ext_icon_16.png",
      "20": "icons/ext_icon_20.png",
      "32": "icons/ext_icon_32.png",
      "40": "icons/ext_icon_40.png",
      "48": "icons/ext_icon_48.png",
      "128": "icons/ext_icon_128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "toDiscord2@happyworks.com"
    }
  },
  "permissions": [
    "activeTab",
    "menus",
    "storage",
    "unlimitedStorage"
  ],
  "options_ui": {
    "open_in_tab": true,
    "browser_style": true,
    "page": "pages/options.html"
  }
}