Examine source code of Todoist Quick Save

{
  "manifest_version": 2,
  "name": "Todoist Quick Save",
  "version": "1.0.0",
  "description": "Save current URL as a task to a predefined Todoist project with a keyboard shortcut or toolbar button",
  "browser_specific_settings": {
    "gecko": {
      "id": "todoist-quicksave@yourdomain.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "notifications",
    "menus",
    "https://api.todoist.com/*"
  ],
  "browser_action": {
    "default_icon": {
      "96": "icon.png"
    },
    "default_title": "Save to Todoist"
  },
  "options_ui": {
    "page": "popup.html",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "commands": {
    "save-to-todoist": {
      "suggested_key": {
        "default": "Ctrl+Alt+S"
      },
      "description": "Save current URL to Todoist"
    }
  },
  "icons": {
    "96": "icon.png"
  }
}