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1. On your computer, open Firefox.
2. At the top right, click open menu Image Modified
3. Select Preferences
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4. Scroll to Applications.
5. In the Applications tab, type PDF in the search field. 
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6. For Portable Document Format (PDF) content type in the search result, select Use Adobe Acrobat (in Firefox) from the Action drop-down list. You may need to select Foxit if this application is installed on your computer instead of Adobe Acrobat.
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7. Restart Firefox.

PDF links will now open directly in your default Windows PDF reader.

1. On your computer open Internet Explorer

2. Select Tools > Manage Add-ons

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3. Under Add-on Types, select Toolbars And Extensions

4. In the Show menu, select All Add-ons.

   

5. In the list of add-ons, select Adobe PDF Reader. Note: If you do not see the Adobe PDF Reader add-on, try the other options on the menu. For example, on some systems, the add-on appears when you select Run Without Permission.

6. Click the Enable or Disable button (it toggles depending on the status of the selected add-on):

   Enable sets the Adobe PDF Reader add-on to open PDFs in the browser.

   Disable turns off the add-on so it does not open PDFs in the browser.