When you click a PDF link on a web page, it can open either within the web browser or directly in Acrobat or Reader. Each browser has its own settings to control how PDFs open from a web page. Acrobat DC and Acrobat Reader DC do not include a preference setting to open web-based PDFs. To change the display behavior, follow the instructions below for your browser, or see the browser documentation on how to control plug-ins or add-ons.
Internet Explorer 8 and later
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.Select Adobe PDF Reader, and click the Enable/Disable button.
For more information, see the Internet Explorer help topic: Manage add-ons in Internet Explorer - http://windows.microsoft.com/en-IN/internet-explorer/manage-add-ons#ie=ie-11
Choose an appropriate option in the drop-down list next to the name of the plugin.
Always Activate sets plugin to open PDFs in the browser.
Ask to Activate prompts you to turn on the plugin while opening PDFs in the browser.
Never Activate turns off the plugin so it does not open PDFs in the browser.Select the Acrobat or Reader plugin in the Add-ons Manager.
For more information, see the Mozilla Firefox help topic Using a PDF Reader Plug-in.
Chrome and Acrobat are no longer compatible. For more information, see Change in support for Acrobat and Reader plug-ins in modern web browsers.
Safari browser preferences
You must have root user privileges to change the Safari plug-ins. To display PDFs using the Safari PDF viewer, you must disable the Adobe PDF Viewer.
Log in as the root user. The root user privileges aren't enabled by default because the root user can change system files. For more information and instructions, see one of the following Apple documents: Enabling and using the "root" user in Mac OS X or OS X Mountain Lion: Enable and disable the root user.
Open the Internet Plug-ins folder, and move both the AdobePDFViewer.plugin and the AdobePDFViewerNPAPI.plugin into the new Internet Plug-ins Disabled folder.
If both AdobePDFViewer plug-ins are still in the Internet Plug-ins folder, drag them now to the trash. You may be asked for your name and password.
For more information, see the Apple Safari help topic If you need to remove a plug-in.