Examine source code of search capabilities

{
  "manifest_version": 2,
  "name": "__MSG_extension_name__",
  "short_name": "find+",
  "version": "2.2.2",
  "author": "Brandon Richardson, Michael Walz",
  "description": "__MSG_extension_description__",
  "default_locale": "en",
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "contextMenus",
    "<all_urls>"
  ],
  "icons": {
    "16": "resources/icon.png",
    "48": "resources/icon.png",
    "128": "resources/icon.png"
  },
  "browser_action": {
    "default_icon": "resources/icon.png",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "app.js",
      "background/browser-action-proxy.js",
      "background/content-proxy.js",
      "background/background.js",
      "background/omni.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": false,
      "run_at": "document_end",
      "js": [
        "app.js",
        "lib/html-entity-handler/entityhandler.js",
        "content/content.js",
        "content/parser.js",
        "content/highlighter.js"
      ]
    }
  ],
  "omnibox": {
    "keyword": "find"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F",
        "mac": "MacCtrl+Shift+F"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{acd2de4d-a259-44ac-ad6d-6018190c5afe}"
    }
  }
}