What can you not download. What OS version? What version of Firefox. Please give the exact message.
I mean l cannot down load adobe flash player 11 and it can install until 50% then stop and asked to close program of firefox so I cannot fix it out.
thank you so much
You need to download the installer, e.g. from http://forums.adobe.com/thread/909550, then close all browser windows and run the downloaded installer.
If you need more help, please specify your operating system & version.