A unique functionality known as "Tab to Search" is present in Chrome/Chromium and other web browsers, which implements the OpenSearch specification.
To enable this feature, follow these steps:
Include
<link rel="search" type="application/opensearchdescription+xml" href="url_of_osdd_file" title="Website Name">
in the page header.
Add the specified "OSDD" file linked from the link
in step 1 (containing essential options):
<?xml version="1.0"?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
<ShortName>Search My Site</ShortName>
<Description>Search My Site</Description>
<Url type="text/html" method="get" template="http://my_site/{searchTerms}"/>
</OpenSearchDescription>
Refer to this link for more information.
Please note that while this feature can be implemented on any website, the website must support or provide its own search functionality, as Chrome or Google will not conduct searches for the website through this method.