Opening docs from sites puzzle--why no choice to open or save?

== Issue == I have another kind of problem with Firefox == Description == This is a real puzzle with no clear answer yet on the boards that I could find. Two iMacs. One running OS X 10.5.8 and Firefox 3.6.3 and the other running OS X 10.5.8 and Firefox 3.5.9. Problem happens on the one running the newer version of Firefox only. When trying to open a pdf directly from a website, the dialog box only allows a save option with no direct open option. attaching two jpgs--one illustrating the problem (just the save option) and the other ("noproblem") showing what we want: a choice to save or open. What do I need to do on the machine with the problem to change the dialog box to the open and save variety shown in "noproblem"? Thank you!! == This happened == Every time Firefox opened == Maybe 7 months ago; around the time that the machine was upgraded to FF 3.6.3 == == Troubleshooting information == on the problem machine: Map+ 1.2 Wiss RSC News Reader 3.1.0.4 == Firefox version == 3.5.9 == Operating system == Intel Mac OS X 10.5 == User Agent == Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1.9) Gecko/20100315 Firefox/3.5.9 == Plugins installed == *-BrowserPlus -- Improve your browser! -- http://browserplus.yahoo.com/ *Shockwave Flash 10.0 r42 *Gecko default plugin *Runs Java applets using the latest installed versions of Java. For more information: Java Embedding Plugin. Run version test: Java Information. *WebEx General Plugin Container Version 169 *npmnqmp 07103007 *The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site. *The Google Earth Plugin allows you to view 3D imagery and terrain in your web browser. *2.0.40115.0 *RealPlayer Plugin *iPhoto6