The Greenhouse Prospecting Chrome Plugin provides functionality to make searching Greenhouse more efficient while prospecting and is installed on a per user basis.
Once the plugin is installed, a user can click on the Greenhouse icon 
to open the Greenhouse Prospecting panel in your browser and highlight any name or email address. The plugin will search your Greenhouse account for potential matches.
Find a Match
If you find a match, you will see a link within the Prospecting Panel that will take you to the search results for that candidate's name or email address so you can decide whether they are truly a duplicate or simply another person with the same information.
Note: The Greenhouse Prospecting Chrome Plugin will only search through jobs and candidates that you have access to based on your Greenhouse permission levels.
Add Prospect to Greenhouse
If the person does not exist in your Greenhouse account and you would like to add the person as a prospect, you can click the Prefill button to quickly add available personal information into the extension.
Note: Prefill can only fill in the First and Last Name of the person, and their email. For more information on why, please visit: LinkedIn's Scraping Software Policy.
Enter any additional desired information into the fields in the Prospecting Panel (e.g. name, current title, current company, and the URL to the prospect's profile on that particular website or application).
If you would like to add the person as a Prospect for a particular department or office, or a specific job, continue to scroll down within the Greenhouse Prospecting Panel to fill-in any of these fields.
When ready, click the Add this Prospect button at the bottom of the side bar.
If the plugin is not working for you, make sure you are logged into your Greenhouse account, then close and reopen Chrome and try again to force the extension to update.