Fenix: "Download Failed" when downloading a PDF on some websites. [Bug]

[Sodel-the-Vociferous]

Steps to reproduce

• Sign in to my payroll web account.
• Navigate to my pay statements.
• Click on any pay statement PDF.

Expected behavior

• Download completes. Chrome and Firefox 68 handle this task without any issue on this site.

Actual behavior

• Android notification: "Download failed". There are no on-device developer tools or logs to help me troubleshoot.

Device information

• Android device: Moto G8 Power, Android 10
• Fenix version: 79.0.5

[Amejia481]

@Sodel-the-Vociferous if it's not much trouble, would you mind sharing which site you where using? That will be helpful for us to replicate and fix the issue. Thanks in advance.

[dholbert]

I've been running into this same issue with Fenix Nightly (and then the failure notifications respawn on every app restart, per #14790)

The PDFs that Fenix is having trouble with, most recently on my device, are the "Bottle Capacity Chart" and "Product Manual" linked under "Manuals and Guides" near the bottom here:
https://www.costco.com/wine-enthusiast-somm-series-2-door-dual-zone-wine-and-beverage-center.product.100458858.html

Both PDFs download fine in Chrome.

[LaurentiuApahideanSV]

I can confirm the issue is reproducible on Firefox Preview Nightly 200908 (Build #2015762675)

Devices used:

• OnePlus 6T (Android 9)
• Huawei MediaPad M3 (Android 7.0)

[kevinoid]

I encountered what I think is the same issue attempting to download https://enterprise.spectrum.com/content/dam/spectrum/enterprise/en/pdfs/support/Motorola%20User%20Guide_WiFi%20LAN.pdf Tapping the Download button immediately results in "Download failed". Remote debugging shows request initiation on the Network tab, but no status or headers.

Device information

• Android Device Google Pixel with Android 10 (Build QP1A.191005.007.A3)
• Fenix version: Nightly 200912 06:01 (Build #2015763443)

[liuche]

I was able to successfully download the link you provided @kevinoid - is this still present on the latest Nightly?

[kevinoid]

Thanks @liuche, I can confirm that the link (and all other PDF URLs I tested) download without issue using Nightly 201014 17:01 (Build #2015769675). Works for me!

[LaurentiuApahideanSV]

Verified as fixed on Firefox Preview Nightly 201015 (Build #2015769771).

Devices used:

• OnePlus 6T (Android 9)
• Samsung Galaxy S9 (Android 8.0.0)