oSearch is a Chrome add-on developed by seril that allows users to easily and quickly search through websites using OpenSearch. With this add-on, users can add an OpenSearch Description Document (OSDD) for supported sites, enabling Chrome to recognize these sites as search engines.

Once a supported site's page is fully loaded, Chrome will automatically add it as a search engine. From there, users can simply enter the keyword, usually the website address, and then use the default keyboard shortcut, which is Space or Tab, to continue the search.

oSearch is a free add-on that falls under the Browsers category and specifically the Add-ons & Tools subcategory. It provides a convenient way to search through websites directly from the address bar, making it a useful tool for users who frequently search for information on specific sites.