I tried to install Adobe 9.3using firefox, it takes me to the download page then a yellow bar appears at the top saying additional plugins required. So I hit the install missing plug-ins button then a box pops up that says no suitable plugins where found. So I tell it to search and it comes up with a gp.xpi that I need to download but this does nothing because my computer doesn't know how to open it. What am I doing wrong?
I can give you a direct download link if you tell us your operating system.
I am on Windows Vista
gp.xpi is getting installed properly on my machine(English Vista+Firefox 3.6.8 ).
You can try to install Reader 9.3 directly from :
Then update it to version 9.3.3 by clicking on Help>Check for Updates (from Reader Menu).