About usage of pdf.js in WebView

[scientificware]

Extracted from mozilla/pdf.js#15087

Configuration:

• Web browser and its version: WebView 102.0.5005.125 ( Released on 13 june 2022 )
• Operating system and its version: Android 10
• PDF.js version: 2.9.359 to 2.14.305
• Is a browser extension:

Steps to reproduce the problem:

1. See FXMessages X6
2. MainActivity

Tested	pdf.js Version	Legacy	PDF displayed	Error Message	Work around
✔️	2.9.359 Prebuilt		✔️	⚠️
✔️	2.10.377 Prebuilt		✔️	⚠️
✔️	2.11.338 Prebuilt		❌	Uncaught SyntaxError
✔️	2.12.313 Prebuilt		❌	Uncaught SyntaxError
✔️	2.13.216 Prebuilt		❌	Uncaught SyntaxError
❌	2.13.216 Prebuilt		❔	❔	❔
✔️	2.14.305 Prebuilt		❌	Uncaught SyntaxError	switch to 2.14.305 Prebuilt Legacy
✔️	2.14.305 Prebuilt	✔️	✔️	⚠️

2.14.305 :

I/chromium: [INFO:CONSOLE(1753)] "Uncaught SyntaxError: Unexpected token '='", source: file:///android_asset/js/moz_pdfjs/build/pdf.js (1753)
I/chromium: [INFO:CONSOLE(1561)] "Uncaught SyntaxError: Unexpected token '='", source: file:///android_asset/js/moz_pdfjs/web/viewer.js (1561)

2.14.305 Legacy :

I/chromium: [INFO:CONSOLE(665)] "_readPreferences: "Cannot read property 'getItem' of null".", source: file:///android_asset/js/moz_pdfjs/web/viewer.js (665)
I/chromium: [INFO:CONSOLE(2101)] "PDF 36e9d6a8dec85dbda59b93a5ad1dcb1d [1.3 ESP Ghostscript 815.03 / -] (PDF.js: 2.14.305)", source: file:///android_asset/js/moz_pdfjs/web/viewer.js (2101)