The External Viewer Hijack
While Google Chrome features a highly capable internal PDF viewer designed to open documents directly within a browser tab, certain system configurations or rogue extensions can hijack this behaviour. Instead of quickly rendering a menu or a receipt in a new tab, Chrome might suddenly start forcing the PDF file to download to your hard drive and immediately triggering your operating system (like Windows or macOS) to launch an external application—such as Adobe Acrobat or Preview—to display it. This breaks the seamless web browsing experience, clutters your downloads folder, and wastes system memory by unnecessarily launching heavy standalone software.
Restoring the Internal Renderer
To stop Chrome from automatically exporting your PDFs to external software and force it to render the documents natively within its own tabs, you must correct a specific toggle in the site settings menu.
Open Google Chrome, click the three vertical dots in the top-right corner, and select Settings. In the left-hand navigation pane, click on Privacy and security. In the main window, click on Site settings. Scroll down to the very bottom of the page and click to expand the Additional content settings menu. From this expanded list, click on PDF documents. Here, you will see a radio button selection defining the default behaviour. If it is currently set to “Download PDFs,” the browser is aggressively pushing the files to your external viewer. You must select the radio button labelled Open PDFs in Chrome. The change is applied instantly. The next time you click a PDF link, it will render cleanly and instantly in a new browser tab.