14 DAY TRIAL // The forth beta release in the new Firefox 23.x branch has been made available for download, by Mozilla, for all available platforms.
The binaries for Mozilla Firefox 23.0 Beta 4 can be downloaded and run, without having to install anything.
Mozilla hasn't released any details about this latest release, but the short period between versions indicates that a new stable version shouldn't be that far off.
A detailed list of upcoming features and other various changes can be found on the official website.
Download Mozilla Firefox 23 Beta 4 for Windows
Download Mozilla Firefox 23 Beta 4 for Linux
Download Mozilla Firefox 23 Beta 4 for Mac OS X
Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.