Examine source code of Page Notes & Highlight

{
  "manifest_version": 2,
  "name": "Page Notes & Highlight",
  "version": "1.0.0",
  "description": "Save selections as notes from the context menu and highlight them on any page.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{95a0a814-9684-474c-95dd-78ab472021a4}",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Notes & Highlight",
    "default_icon": {
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}