Examine source code of Auto Highlight

{
  "name": "Auto Highlight",
  "version": "3.6.0",
  "description": "*Auto Highlight* automatically highlights the important content on article pages.",
  "options_ui": {
    "page": "src/options/options.html"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "optional_permissions": [
    "tabs",
    "clipboardWrite",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/matchPattern.js",
      "src/shared.js",
      "src/eventPage.js"
    ]
  },
  "action": {
    "default_icon": {
      "19": "icons/0highlight19x19.png",
      "38": "icons/0highlight38x38.png"
    },
    "default_title": "Toggle highlighting"
  },
  "icons": {
    "16": "icons/16x16.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{befda162-c436-413c-9005-f491858885c1}"
    }
  }
}