Ubuntu’s new daily “Dangerous” desktop builds are now available download — ideal for anyone who find the current Ubuntu 25.10 Beta a little too un-risky!
Not that these Ubuntu Dangerous builds are inherently dangerous, of course. They are regular daily builds of Ubuntu’s development release, but with preinstalled Snaps preconfigured on their respective ‘edge’ channels, rather than the latest in-series stable (like a normal daily build).
Canonical’s engineers announced plans for Ubuntu Dangerous desktop images last month (which I covered in a snarky conversation format). Today, 19 September, the first ISOs were published on the Ubuntu CD image server.
Ubuntu Not-So Dangerous
Ubuntu Dangerous builds aren’t strictly intended for end-users (no more than any daily build is). They will mainly be of interest to developers, engineers and testers who want or need to test the latest features, changes and capabilities in desktop snaps.
Preinstalled snaps on Ubuntu desktop include user-facing software like Mozilla Firefox, Thunderbird, Snap Store, Firmware Updater, and the desktop Security Center.
Other preinstalled snaps on their edge changes include the low-level components, including snapd and its integration package, the core runtimes, GNOME desktop base snaps, experimental prompting client, Mesa drivers (separate from system ones), and theme packages.
If you want to download an Ubuntu Dangerous daily build — usual caveats about running developement software apply doubly — point your web browser at the the daily-dangerous folder on the Ubuntu CD image server.