Examine source code of Word/User Highlighter

{
  "manifest_version": 2,
  "name": "Word/User Highlighter",
  "version": "2.1",
  "description": "Highlight specific words or usernames on any website with custom colors.",
  "author": "OpenAddons",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "background": {
    "scripts": [
      "storage-utils.js",
      "util.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{c1b2b82a-51cd-4e5e-99e3-96e60283e52f}"
    }
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg",
    "128": "icon.svg"
  },
  "options_page": "options.html",
  "permissions": [
    "storage",
    "tabs",
    "downloads",
    "<all_urls>",
    "activeTab",
    "alarms",
    "contextMenus",
    "notifications"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "storage-utils.js",
        "util.js",
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icon.svg",
    "default_popup": "popup.html",
    "default_title": "User/Word Highlighter"
  }
}