On Monday September 25th from 10PM EDT - 12AM EDT (2AM UTC - 4AM UTC on September 26th), we will be performing system maintenance on the Firefox Accounts databases for two hours. During the maintenance window, there will be brief periods of a few minutes where users will not be able to login to their accounts. Please try again at a later time.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Unable to open .pdf in Firefox 3.6.8 with Adobe Reader 9.3.3 installed. Error message is "The Acrobat/Reader that is running can not be used to view PDF files in a web browser."

  • 2 replies
  • 190 have this problem
  • 29 views
  • Last reply by cor-el

rwfairchild
rwfairchild
more options

I am unable to open a PDF file in Firefox 3.6.8. Adobe Acrobat Reader 9.3.3 is installed. I get the error message "The Adobe Acrobat/Reader that is running can not be used to view PDF files in a web browser."

I am unable to open a PDF file in Firefox 3.6.8. Adobe Acrobat Reader 9.3.3 is installed. I get the error message "The Adobe Acrobat/Reader that is running can not be used to view PDF files in a web browser."

All Replies (2)

Helper7677
Helper7677
more options

Try these suggestions: http://kb2.adobe.com/cps/405/kb405461.html

cor-el
cor-el
  • Top 10 Contributor
  • Moderator
more options

You can get that error if there is still an old Adobe Reader plugin in the plugins folder in the Firefox program folder. 

C:\Program Files\Mozilla Firefox\plugins\nppdf32.dll

See also http://kb.mozillazine.org/Adobe_Reader

Modified by cor-el