After a dozen or so PDFs it got really old so I decided to make this tool.
How it works is you prefix any GitHub URL that points to a PDF file with "pdf" so instead of:
"github.com/bogdannbv/pdfgithub.com/blob/main/example/file.pdf"
It becomes
"pdfgithub.com/bogdannbv/pdfgithub.com/blob/main/example/file.pdf"
Now you'll be able to view the PDF directly in your browser, no downloads, no extra steps.