The Microsoft Edge browser is the default app for PDF files on Windows PCs. However, you can easily change your default PDF viewer to Adobe’s Acrobat Reader DC for files saved to your Windows PC.

Mozilla's latest version of Firefox conveniently includes a built-in PDF viewer. If you prefer your own PDF viewer, here's how to change it.

How to Make Adobe Acrobat the Default PDF Viewer. The PDF, or portable document format file, was created to transform output from any document creation software into a file almost any recipient ...