G-CPTN,
This info comes from the firefox forum below and specifically from a mod. (So it must work then.)
Try:
1) Type about
lugins in the address bar and find the Adobe Reader entry. Is it there at all and which version is shown?
(G-CPTN if your browser is showing a smilie when you view these instructions between the word about and the word plugins then blame the PPRuNe software. The suggestion is to type about : plugins in your firefox address bar but remove both the spaces either side of the colon.)
2) If the version from above does not match the Reader version you have installed remove the nppdf32.dll from the FF plugins folder.
3) Tools -> Options -> Downloads -> View & Edit Actions and point PDF to the correct reader.
4) Open Reader -> Edit -> Preferences -> Internet -> Check "View PDFs in browser
Here is the full thread:
http://forums.mozillazine.org/viewtopic.php?t=456143
Still no luck you could try
http://kb.mozillazine.org/Adobe_Reader
If still no luck then try the
forum
Then type and enter the word acrobat in the search forums box and then you should get about 119 results.
It appears you are not alone.
If these links are dodgy then please forgive me as sometimes they work straight away and sometimes they take ages to load. I hope that this helps rather than confuses.