Examine source code of Custom Key Bindings

{
  "manifest_version": 2,
  "name": "Custom Key Bindings",
  "description": "Assign custom hotkeys for browser actions: new/close tab, back/forward, reload, scroll, etc.",
  "version": "1.0",
  "icons": {
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/icon-64.png",
    "default_title": "Custom Key Bindings",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{70555bc3-ec5d-41cb-95d2-bbcf5288ff8a}",
      "strict_min_version": "90.0"
    }
  }
}