1. inputmode attribute

    The `inputmode` attribute specifies what kind of input mechanism would be most helpful for users entering content into the form control.

  2. Referrer Policy

    A policy that controls how much information is shared through the HTTP `Referer` header. Helps to protect user privacy.

  3. Resource Timing (basic support)

    Method to help web developers to collect complete timing information related to resources on a document.

  4. User Timing API

    Method to help web developers measure the performance of their applications by giving them access to high precision timestamps.

  5. css property: cursor: help