Examine source code of Restivity

{
  "manifest_version": 2,
  "name": "Restivity",
  "description": "Quick access to your Restivity tasks and pomodoro timer",
  "version": "0.2.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "tabs",
    "cookies",
    "scripting",
    "https://restivity.ai/*",
    "https://www.restivity.ai/*",
    "https://restivity.app/*",
    "https://www.restivity.app/*",
    "https://*.atlassian.net/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "restivity@restivity.app",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Restivity",
    "default_popup": "popup.html"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Restivity"
  },
  "content_scripts": [
    {
      "matches": [
        "http://localhost:3000/*",
        "https://restivity.ai/*",
        "https://restivity.app/*",
        "https://www.restivity.ai/*",
        "https://www.restivity.app/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}