Method 2: Open Chrome in incognito mode and then try to open pdfġ. Note: – If it is already Off, then turn it On and then turn it off again. Now, exit from the browser, restart Chrome, and your PDF files should be opening perfectly fine. Step 4: In the PDF Documents page, move the slider to turn off the option – Download PDF files instead of automatically opening them in Chrome. Now, find PDF documents and click on the arrow next to it. Step 3: In the next window, scroll down and click on Additional document settings to expand it. Step 2: In the Settings window, click on the Privacy and security option on the left side of the window > on the right-hand side of the pane, click on the arrow next to the Site Settings option.