Brave behaves as if an application it's supposed to launch is not installed, while Firefox works correctly

[wknapik]

Description

On up-to-date GrapheneOS (Android 13), with sandboxed Play Services running, Brave 1.46.138, when it's supposed to open an app, DidiD in my case, behaves as if the app is not installed and breaks the entire process involving the app. This works correctly in Firefox 108.1.0.

In the Netherlands, there is a covid vaccination app called CoronaCheck and an identity app called DigiD, which can be used to authenticate to various government (and non-government?) services.

To add a vaccination to the CoronaCheck app, the user has to authenticate and the popular way to do it is via the DigiD app. So in CoronaCheck, the user clicks to authenticate with DigiD, which opens the default browser, which is then supposed to launch the DigiD app, but instead says the app must be installed first.

Steps to reproduce

1. Open CoronaCheck
2. Click to add a vaccination
3. Choose to authenticate with DigiD
4. See the browser say that the app is not installed
5. The process of adding a vaccination in CoronaCheck is aborted

Actual result

Failure

Expected result

Success

Issue reproduces how often

Easily reproduced

Version/Channel Information:

• Can you reproduce this issue with the current Play Store version? Yes
• Can you reproduce this issue with the current Play Store Beta version? Yes
• Can you reproduce this issue with the current Play Store Nightly version? Yes

Device details

• Install type (ARM, x86): ARM
• Device type (Phone, Tablet, Phablet): Phone (Pixel 6)
• Android version: GrapheneOS (Android 13)

Brave version

1.46.138

Website problems only

• Does the issue resolve itself when disabling Brave Shields? No
• Does the issue resolve itself when disabling Brave Rewards? n/a
• Is the issue reproducible on the latest version of Chrome? ?

Additional information

[SergeyZhukovsky]

It works ok on Samsung Galaxy S10 with play services installed. Perhaps the problem appears on GrapheneOS only.

[wknapik]

Also doesn't work in Vanadium, a Chromium-based browser.

The fact that it works in Firefox suggests that this is not about GrapheneOS.