Currently I am facing an very annoying issue with Acrobat Reader and Firefox. If I am opening a PDF with the standalone Application everything is fine and I may browse the file using the keyboard.

Within Firefox I cannot use keys to advance to the next page of an embedded PDF that I open directly from the net.

Does anyone know a remedy against that?

RPMs:
AdobeReader_deu-8.1.2-1
firefox-2.0.0.14-1.fc8

Linux:
Fedora release 8 (Werewolf)

Hello brianmcgee
I've noticed the same problem as you sometimes, and I had to click first on the embedded PDF frame to get the keys working again.
Did you try that ?
It's an ugly workaround though, and there is another problem on my machine with a zombie process created after the frame closes, which prevents the PDF plugin to work another time until firefox gets restarted.
And the PDF Download extension doesn't work with all the links which lead to a PDF document, and so doesn't solve that problem.
At that hour, I didn't find a solution or workaround to these annoying things.
I use Firefox 2.0.0.14 from Mozilla and acroread 8.1.2 from the Adobe rpm binary package.