Examine source code of RightTasks for Gmail™

{
  "manifest_version": 3,
  "name": "RightTasks for Gmail™",
  "description": "Improved task management in Gmail™",
  "version": "3.2.0",
  "icons": {
    "16": "images/righttasks-icon-16.png",
    "48": "images/righttasks-icon-48.png",
    "128": "images/righttasks-icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://mail.google.com/",
    "https://tasks.google.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*",
        "https://tasks.google.com/*"
      ],
      "all_frames": true,
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content.css"
      ],
      "matches": [
        "https://mail.google.com/*",
        "https://tasks.google.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-mxLXoM0pmaQU1Q@jetpack"
    }
  }
}