Hello,
After FireFox upgraded itself to 2.0.10, various things in Domino Web Access is breaking. Upgrading to 2.0.11 didn’t solve the problems.
When I try to attach a document, I get an error message “Sorry we are unable to process …”.
Every once a while the same message automatically pops up.
Subject: FireFox 2.0.10 breaking Web Access
Fixed.
Add this line to Data/httpd.cnf file.
AddType .jar application/java-archive
Restart Domino or just the http server.
Subject: RE: FireFox 2.0.10 breaking Web Access
Thank’s Bibhas, worked for me 
Bjorgvin
Subject: FireFox 2.0.10 breaking Web Access
Thank you for the fix, however I need confirmation from IBM that this works before I can implement this. Is there a technote from IBM that confirms this. Thank you…
Subject: FireFox 2.0.0.10 breaking Web Access
I don’t see an external technote on this one, but it appears that IBM has an internal one noting the addition of the Java Archive type to the httpd.cnf file. It seems to work, and only required that the HTTP task be bounced.
One challenge was editing the httpd file in a Windows environment - it appears as a shortcut and you can’t edit it. I had to go to Tools → Folder Options → File Types and add “edit” to the CNF file type. I just linked notepad.exe to “edit.” Once that was done, I could right-click the file and edit away.
On the client end, be sure to clear the browser cache.
Hope this helps.