You have multiple Adobe PDF Plugins installed, and that might be causing your crashing problem. Remove the older version of Adobe through the Windows Control Panel > Add or Remove Programs.

I checked the control panel and as far as I can tell I only have a single plugin installed, although it is hard to tell as none of them actually calls itself a plugin. What I believe is the newly installed plugin is called Adobe Reader X (10.1.0). I also have Adobe Acrobat 9 standard listed, but I thought Acrobat and Reader were different programs. Anyone?

Adobe Acrobat Reader is now widely known as Adobe Reader. You need to Uninstall Adobe Acrobat 9.

go to Control Panel -> Add/Remove Programs

Check and tell if its working.

I am having the same problem. I have tried multiple Firefox solutions in resetting downloads (uncorrupted), etc. I also dropped all my Adobe products and re-downloaded them. I can also download pdfs from sites other than jstor.org. What do you think I should do?

@TheHilarious

Maybe the problem is only on the jstor.org website.

Start Firefox in Safe Mode

• http://kb.mozillazine.org/Safe_Mode

Check and tell if its working while you are using Firefox Safe Mode.

Troubleshooting extensions and themes

• https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes

The following solution is useful for people who have the full version of Acrobat 9, but are getting the error message "the Adobe Acrobat plugin has crashed". You probably want the features in the full version of Acrobat, but still need to be able to open PDF files from your Firefox browser.

Go to Tools > Options > Applications. Scroll down and change all of the Adobe Acrobat files to open with Acrobat 9 (or whatever version you have) instead of "Use Adobe Acrobat (in Firefox)". This may not be as handy as having it use Acrobat inside the Firefox browser, but it will still let you open PDF files without having to uninstall the full version of Acrobat. Hope this helps.

Looks like the solution is delete Acrobat 9 (or update to Acrobat 10) to prevent crashes between V 9 and Reader 10. However, my company won't let me upgrade to V10 for Acrobat. Therefore deleting Acrobat is not an option. Can I get (and use) Acrobat Reader 9 and resolve crashing issue?

Sorry, forgot to add that I did go to Options/Applications and use Reader as the default program... issue still exists.

@robert952

Please start your own thread, so the forum software can show us your More system details. The "Owner" of this thread had multiple Adobe Reader plugins for Firefox - maybe that's your problem too?

@robert 952: In Options > Applications, try the option "save file."

I have the same issue as well and here is how I made mine works: Situation: I have adobe acrabat 9 and adobe reader 10 installaed on my windows xp Firefox crash whenever trying to open pdf file Action: firefox -> tools -> addon -> plugins disable adobe acrabat plugin Tried open pdf with firefox again, it ask which program to use (choose adobe reader instead, you might need browse from program -> adobe to find the exe file) Result: Works fine on my computer and I check the do not show this again

Hope it helps.

Appreciate input from zhangbob428, and his recommendation does allow me to open PDFs in a separate Adobe window. However, this crash within Firefox is unacceptable. Firefox needs to fix the plugin to allow Adobe Reader X Version 10.1.2 to work within Firefox 9.0.1. I have subscribed to this thread and I'm waiting for authoritative feedback from Firefox once the problem is fixed.

Perform the suggestions mentioned in the following articles:

• Clear Cookies & Cache
• Use Adobe Reader to view PDF files in Firefox
• View PDF files using Firefox’s built-in viewer
• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Check and tell if its working.

Thanks mha007. Did everything you recommend and PDFs open and then crash. I'm back to solution recommended by zhangbob428, which is not really acceptable. Still waiting for Mozilla to provide authoritative solution.

-> Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

Check and tell if its working.

"Firefox needs to fix the plugin to allow Adobe Reader X Version 10.1.2 to work ..."

Adobe needs to fix their software, whether the problem is with their plugin for Firefox or the Reader program. Mozilla isn't going to fix software made by a 3rd party, which might not even be legal to do.
http://en.wikipedia.org/wiki/Digital_Millennium_Copyright_Act

Using Firefox 10.0 and Adobe Acrobat 9 Pro 9.4.0. After reading some help pages on the Adobe site that said to repair the Adobe Reader X installation, I decided to remove Adobe Reader X completely as I also have Adobe Acrobat 9 Pro.

This worked and the PDFs are now opening in Firefox! Settings are as follows:

Add-ons Manager: Adobe Acrobat 9.4.0.195 - enabled

Tools>>Options>>Applications: Adobe Acrobat Document - "Use Adobe Acrobat (in Firefox)"