Examine source code of Safe Highlighter & Notes

{
  "manifest_version": 2,
  "name": "Safe Highlighter & Notes",
  "version": "1.0.0",
  "description": "Highlight paragraphs on demand and save a simple site-specific note. No remote code, no inline scripts, minimal permissions.",
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_popup": "popup/popup.html",
    "default_title": "Safe Highlighter & Notes"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "options_page": "options/options.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "safe-highlighter-notes@example.com"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'"
}