1412301 - [PWA] PWA doesn't always open in standalone mode

Status: VERIFIED FIXED

(Firefox for Android Graveyard :: Web Apps (PWAs), defect, P2)

Description

[Oana Horvath [:ohorvath]]

Device: Samsung Galaxy S8 (Android 7.0)
Build: Nightly 58.0a1 (2017-10-27);

Steps to reproduce:
1. Add to the home screen a PWA: e.g.pokedex.org, code.nasa.gov, etc.
2. As soon as the shortcut is displayed on the homescreen, tap and open the PWA.

Expected result:
The PWA should be launched as a standalone app.

Actual result:
The PWA is at first opened in a new tab. At the second launch, it opens in standalone mode. Not 100% reproducible, not even with the same apps.

Comment 1

[Oana Horvath [:ohorvath]]

Attachment: recording.mp4

In this recording you can see I've had multiple pwa's already opened, I added the Notes PWA and it opened in a new tab at first.

Comment 2

[Dylan Roeh (:droeh) (he/him)]

Most likely we're just trying to start the app before the manifest is written to disk, probably due to the use of JSONFile.saveSoon in Manifest.jsm. I'll see what our options are.

Comment 3

[Dylan Roeh (:droeh) (he/him)]

Attachment: Decrease save-delay for PWA manifests

I think this should fix it; we just need to reduce the save delay to make sure the manifest is actually written to disk before we try to run the corresponding PWA.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/mozilla-inbound/rev/e8b5f0c97d03
Decrease save delay to ensure PWA manifests are actually written to disk before a user tries to run one. r=snorp

Comment 5

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

https://hg.mozilla.org/mozilla-central/rev/e8b5f0c97d03

Comment 6

[Oana Horvath [:ohorvath]]

The issue is fixed on latest Nightly 58 (2017-11-03).
Verified on devices:
Samsung S7 Edge (Android 7.0)
Huawei Honor 5X (Android 5.1.1)