Examine source code of Tab Highlighter Lite

{
  "manifest_version": 2,
  "name": "Tab Highlighter Lite",
  "version": "1.0.0",
  "description": "Quickly highlight selected text on the current page with your chosen color. No host-wide permissions; works on the active tab with user gesture.",
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-highlighter-lite-e07e34877624@example.com",
      "strict_min_version": "102.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Highlighter",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "open_in_tab": true
  }
}