Adobe vs Firefox

Hallo,is there away to get Firefox to admit the PDF in Adobe again via Flathub,without
Google Play Store

I use Firefox Linux under Chromebook

I think you’re asking, is there a way to view PDFs in Adobe Acrobat Reader? If that’s your question, the answer is that Adobe discontinued Acrobat Reader on Linux in 2013. Today on Linux, PDF files are generally read in-browser, or with desktop tools such as Document Viewer. Google Play Store is only for Android and Chrome devices, not Linux.