Beware this branch is still in development, so it is not recommend running it on a live website. The WordPress 5.0 release date has been moved to November 27. The block editor was updated to match the Gutenberg 4.4 release. New changes include: a permalink panel has been added to the document sidebar, editor document panels can now be removed programmatically, the uploading indicator for images and galleries has been replaced, images now take up the right amount of space for themes with wider editors, hover styles are now correctly disabled for mobile devices. Good news for PHP 7.3 support. The final known compatibility issue with this version has been fixed. You could download WordPress 5.0 Beta from WordPress ORG website. Remember to backup your website data before making changes.