Firefox will automatically download files to a default location (e.g., to the Desktop or, depending on your operating system, to a special "Downloads" folder) unless you've selected a different download folder or you've set Firefox to ask where to save every file.   If downloads fail or if Firefox hangs downloading files it may be related to the download location; for example, the download folder may contain a lot of images , may be corrupt or inaccessible  or the folder may no longer exist.This article explains how to install a new version of your setup project using the Windows Installer update mechanism.When you need to build a new version of your setup project or ship fixes to it, it’s tempting to rebuild the project and try to install the MSI file.
  A user reported in this thread that also changing the location using the old, unsupported Internet Explorer for the Mac solved this problem.
Note that the version property, which becomes the Windows Installer Product Version property, is a key piece of data that relates to updating your product. Figure 1 also shows a Detect Newer Installed Version property that checks, at install time, to see that you’re not trying to upgrade an existing installed version with an older version.
Before describing how Remove Previous Versions works, I’ll explain how Package Code and Product Code interact.
Table C-1 Using This Appendix Tools are small applications that implement a limited set of functions and help you perform management or problem-solving tasks.
The subset of tools discussed in this appendix is presented in categories based on tool uses, such as recovery, diagnosis, and system file maintenance.