Examine source code of RPG Character Sheet

{
  "manifest_version": 2,
  "name": "RPG Character Sheet",
  "version": "1.0",
  "description": "An interactive character sheet for RPG games. Create, edit, and save your character details.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1370b0c-999b-4f2f-869a-92150fdbeb92}"
    }
  }
}