PWA can't be installed on Android using Chrome (works for Firefox, though)

[JackTheMico]

Describe the bug
There's no install button for Organice on Android Chrome.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://organice.200ok.ch with Chrome on Android
2. Click on the top right button
3. Scroll down and try to find the install button
4. Can't find it

Expected behavior
Organice can be installed as a PWA

Screenshots
No install button for Organice

An install button for PWA fox demo

Smartphone (please complete the following information):

• Device: Xiaomi QIN 2 Pro
• OS: Android 11
• Browser: Chrome

Additional context
I'm a Chinese user and I'm using a proxy to use Organice and Dropbox. Could it be the reason for the PWA installation problem?

[schoettl]

I'm not using a proxy. I can confirm this on a Nokia 7 plus with Android 10 in Chrome 107.0.

However, on Firefox for Android, I do see an "Install" button.

Although,

1. I'm not 100% sure if the organice app is not already installed in Chrome(?). At least, organice not on my home screens and not in the apps menu.
2. I tested only on https://organice.200ok.ch/sample – but it should be same as if connected to Dropbox etc.

[JackTheMico]

Yeah, I confirm that Firefox has the install button.
But after "Add to home screen", it seems both of them don't have the offline support features.

[munen]

@JackTheMico Thank you for checking out organice 🙏

Listing the directories is not part of the offline support functionality. It could be, but nobody implemented it, so far. Here's what's supported: https://organice.200ok.ch/documentation.html#offline_support

Since installing the PWA works for FF, I'll change the title of this Issue to Chrome. This issue will have to be tackled by someone using Android/Chrome. I don't own such a device, so I cannot do it.