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Install the latest version of Adobe Reader from Adobe's download page. You should also uninstall any other versions of Reader that are installed. See Adobe's instructions for uninstalling (Reader versions 8 and above). If the PDF reader plugin comes bundled with a reader application and the above troubleshooting methods for Firefox did not work, uninstall and re-install the application. If you still can't view a PDF in Firefox, continue with the next following instructions. This will force Firefox to rebuild its plugin database. If you still can't view a PDF in Firefox, continue with the next following instructions.įollow the instructions in Re-initializing the plugins database. Click OK to dismiss the Preferences window, and then close Adobe Reader. Make sure the first check box, Display PDF in browser, is checked. In the Categories section, click on Internet. Once in Adobe Reader, click the Edit menu in the menu bar, and then click Preferences. If the PDF reader plugin comes bundled with a reader application, check the application plugin setting if there is some. At the top of the Firefox window, click on the Firefox button and then select Exit.
A window with your profile files will open.
Under the Application Basics section, click on Show Folder. The Troubleshooting Information tab will open. Open your profile folder: At the top of the Firefox window, click on the Firefox button, go over to the Helpmenu and select Troubleshooting Information. If PDF files are downloaded instead of displayed, try these solutions