[EPIC] Inline PDF viewer

[ryanleesipes]

Checklist

• I have used the search function to see if someone else has already submitted the same bug report.
• I will describe the problem with as much detail as possible.

App

Thunderbird for Android

App version

10.0b1

Where did you get the app from?

Google Play

Android version

15

Device model

Pixel 9 Pro

Steps to reproduce

Opening PDFs results prompts you to open another app. In Thunderbird desktop PDFs open in PDF.js - a very mature offering from Mozilla with many features.

Expected behavior

We should do the same thing with PDFs in Thunderbird - with an option to open the PDF in another app once we load it up in the app with PDF.js

PDF.js from Mozilla

Actual behavior

Prompted to open in another app.

Logs

No response