You can download the previous version 9.4 from here:
http://get.adobe.com/reader/direct/After you install it, you'll need to update it to v9.4.6 by going to
Help |
Check For Updates.
Be aware though that updating to v9.4.6 doesn't update the Firefox plugin. That remains as 9.4.5.236 and will cause Firefox to report that the plugin is out of date and a security risk if you run a Plugins Check (
link in the Add-ons manager - press CTRL+SHIFT+A to gain access to it).
There's no way around this issue other than by disabling the plugin. If you do that, then the next time you land on a PDF site, Firefox will display a dialog window which gives you the option of either downloading the file to your own machine, or opening it with the disabled plugin. If you choose the latter option, the plugin will be re-enabled again. This means you'll have to disable it once more after you've viewed the PDF file. If you decide to download it to your local machine, right click and scan it for viruses before you open it to be on the safe side.