Articles not marked as read when using per-feed "open in custom browser tab" setting is used

### Steps to reproduce
1. long-click on a feed
2. select "open in" settings
3. select integrated custom Chrome tabs
4. open any article in that feed

### Expected behaviour
The article should be marked as read

### Actual behaviour
The article keeps its unread mark.

### Details
I'm using Firefox (rather than Chrome) as my custom-browser-tab provider on my Android system.

Using version 0.9.9.91 (F-Droid version).