[Bug] Some download file names truncated inappropriately

[neekless]

Trying to download files with periods in their name will have everything after the first period truncated.

Steps to reproduce

Many ways to trigger this but for the sake of testing try downloading these 2 files:

1. https://www.apkmirror.com/apk/google-inc/messenger-google-inc/messenger-google-inc-4-7-056-release/messages-4-7-056-kraken_rc13_xxxhdpi-arm64-v8a-phone-android-apk-download/download/

2. https://download.msfjarvis.website/caesium/wahoo/beta/Caesium-wahoo-v3.6-b792615ced1b.zip

Expected behavior

Actual file names are:

1. com.google.android.apps.messaging_4.7.056_(Kraken_RC13_xxxhdpi.arm64-v8a.phone)-47056249_minAPI21(arm64-v8a)(560,640dpi)_apkmirror.com.apk.

2. Caesium-wahoo-v3.6-b792615ced1b.zip

These are also the file names when downloaded on other browsers (Chrome, Firefox desktop, etc).

Actual behavior

In fenix the downloaded file names are:

1. com.apk

2. Caesium-wahoo-v3.zip

Device information

• Android device: Pixel 2XL Android 9
• Fenix version: Nightly 190726 06:03 (Build #12070610) 📦: 6.0.0 🦎: 68.0-20190711090008 (but has been happening for a few versions now)

Could mozilla-mobile/android-components@b2a1f28 be related?

This is a huge problem in my opinion as most apk downloads are named com.apk and files with version numbers in their name (e.g. v3.1.zip and v3.2.zip) also get the same name (v3.zip).

┆Issue is synchronized with this Jira Task

[NotWoods]

This will get fixed when we transition to the new Gecko download manager (#4296). I'll look into fixing it for the current download manager as well.

[NotWoods]

Fixed in Android Components 6.0.0