Nightly builds are a good thing, they provide immediate feedback to developers if they broke the build. Having a nightly build means that the software stable and is likely to build for new users. Software that is not built regularly is difficult to release. Developed by Mozilla
License: Open Source
GNU IceCat is focused on privacy and free software principles, while Firefox Nightly Build is aimed at users who want to test the latest features and improvements. IceCat prioritizes user freedom, whereas Nightly is for those willing to deal with potential instability for the sake of innovation.