However, you can easily change your default PDF viewer to Adobe’s Acrobat Reader DC for files saved to your Windows PC. And, you can change your default PDF viewer for your browser by installing ...

Disable Firefox PDF viewer If you want to disable the built-in PDF viewer entirely, type, "about:config" in the address bar, then click on the "I'll be careful, I promise!" button.

Open Adobe Reader (located in /Applications) and select "Preferences" from the "Adobe Reader" menu. Make sure that the option "Display PDF in browser using:" is checked.

It is responsible for forcing the browser to use the inbuilt PDF reader on Android 12+ devices. Chrome for Android's built-in PDF reader should come to Android 12+ devices ...

But even after you've upgraded to Chrome 87, you may be surprised to find that nothing has changed for you. This is because Google has hidden the revamped PDF viewer behind an optional flag.

Microsoft has revised its original plans to phase out the old PDF viewer in Microsoft Edge in favor of the Adobe-powered engine. Now, the company plans to kick out the old engine in early 2025.