Mozilla is currently, building and releasing XULRunner simultaneously with Firefox releases. Releases can be found here.
XULRunner releases for 1.9.0, 1.9.1 and 1.9.2 branches (matching Firefox 3.0, 3.5 and 3.6 respectively) are available. The question now becomes “How long does Mozilla keep releasing older branches of XULRunner?” We’d like to re-purpose some of the resources used to build older branches.
Therefore, we intend to stop posting XULRunner builds and releases from the 1.9.0.x branch soon. This would only affect Mozilla building and releasing XULRunner 1.9.0.x. The source code to XULRunner 1.9.0.x would remain available and developers could always build and release their own XULRunner packages from the source code.
Security updates and fixes may still happen on the 1.9.0 branch. If you depend on the 1.9.0 branch and want to get these fixes into your project, you’ll need to build XULRunner yourself.
Mozilla will continue to build and release XULRunner from the 1.9.1 and 1.9.2 branches.
Please feel free to provide feedback on the pros and cons. We’d be interested in knowing how this action affects users of prebuilt XULRunner releases. Follow up on the newsgroup posting.