Bedrock Developer Beta

The Bedrock Developer Beta is a beta version of Bedrock Edition accessible only by developers and marketplace content creators. There hasn't been much documentation of the version.

Information
The version was discovered and leaked by multiple sources, notably by a user known as TantalusC, and was showcased by a YouTuber named Element X, alongside the 1.18 Developer Beta which included the unreleased fireflies and bundles. He received an email from Mojang Studios associates asking him to take down the video, threatening legal action against him. Mojang Studios has a history of taking down videos showing footage of the editions.

Differences from public beta versions
This version has additional development features intended to aid developers.
 * A Java-like F3 screen
 * Advanced settings for terrain generation and weather
 * Slowing down the time
 * Viewing hitboxes
 * Various graphs