https://wordpress.org/news/2018/10/wordpress-5-0-beta-2/
WordPress 5.0 Beta 2 is now available!
This software is still in development, so we don’t recommend you run it on a production site. Consider setting up a test site to play with the new version.
There are two ways to test the WordPress 5.0 Beta: try the WordPress Beta Tester plugin (you’ll want “bleeding edge nightlies”), or you can download the beta here (zip).
WordPress 5.0 is slated for release on November 19, and we need your help to get there. Here are some of the big issues that we fixed since Beta 1:
Block Editor
We’ve updated to the latest version of the block editor from the Gutenberg plugin, which includes the new Format API, embedding improvements, and a variety of bug fixes.
Meta boxes had a few bugs, and they weren’t showing at all in the block editor, so we’ve fixed and polished there.
Internationalisation
We’ve added support for registering and loading JavaScript translation files.
Twenty Nineteen
The Twenty Nineteen repository is a hive of activity, there have been a stack of minor bugs clean up, and some notable additions:
- There’s now a widget area in the page footer.
- Navigation submenus have been implemented for mobile devices.
- Customiser options have been added for changing the theme colours and feature image filters.
Everything Else
The REST API has a couple of bug fixes and performance improvements. PHP 7.3 compatibility has been improved.
We’re fixing the bugs:
All the ones you’ve reported.
Some that we’ve found, too.
Source: Security Feed