Developing a chrome extension for zoho booking to

looking for an expert on chrome extension to maintain a few extensions that our firm developed.
this is a simple test project :
writing an extension that will extract an email field from specific page (contact/event) in zoho booking and redirect to another url adding this email to the query.

* extension will have a setting page where user can set 1 field url_start
* find an email field in contact card in zoho booking m see screenshot:
https://drive.google.com/file/d/17-ERgCnirhXZ4fK84UFKfQhx7odqubFQ/view?usp=drivesdk
* add a button "link to crm" or icon with crm logo or something
* when clicking the button it will redirect to url_start+ [email that was extracted] in a new tab