Examine source code of Super Sticker

{
  "manifest_version": 2,
  "name": "Super Sticker",
  "description": "Attach sticky notes to any element on any webpage",
  "version": "1.2.0",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "commands": {
    "add-note": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description": "Enter Add Note mode"
    },
    "toggle-visibility": {
      "suggested_key": {
        "default": "Alt+Shift+V"
      },
      "description": "Toggle note visibility"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "super_sticker@prmworks.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Super Sticker",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}