Examine source code of Text Highlighter Pro

{
  "manifest_version": 2,
  "name": "Text Highlighter Pro",
  "version": "1.0.0",
  "description": "Highlight important text on webpages with multiple colors and save highlights for later reference",
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Text Highlighter Pro",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "highlighter.css"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9fbf9ee8-6942-4b15-900a-fc5644640943}"
    }
  }
}