cdnjs is a free distributed JS library delivery service.
Facebook Chat Plugin is a website plugin that businesses with a Facebook Page can install on their website.
Firebase is a Google-backed application development software that enables developers to develop iOS, Android and Web apps.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Stripe offers online payment processing for internet businesses as well as fraud prevention, invoicing and subscription management.