Examine source code of Toggl 2.0

{
  "manifest_version": 2,
  "name": "Toggl 2.0",
  "description": "Drop busy. Plan, track, focus.",
  "version": "0.19.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "scripting",
    "storage",
    "cookies",
    "alarms",
    "contextMenus",
    "activeTab",
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "toggl.wxt@toggl.com",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "authenticationInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "web_accessible_resources": [
    "assets/domains.css",
    "css/*",
    "images/content-banners/*",
    "content-scripts/banner.css"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Toggl 2.0",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Toggl 2.0"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.toggl.com/*",
        "*://*.toggl.space/*"
      ],
      "js": [
        "content-scripts/auth.js"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content-scripts/banner.js"
      ]
    }
  ]
}