I noticed this funky bug - under certain circumstances, Ephemeral will open a page in two different browsers. Here are the steps to reproduce:
Open two Ephemeral windows with different pages.
Click the arrow on top right to select different browser than current-default to open the current page. For example, in the screenshot below the current default is Epiphany, so I select Firefox:
In the second Ephemeral window, the default browser will get correctly set to Firefox, keeping all Ephemeral windows in sync. But if you click the icon to open current page as another tab in the opened session of Firefox (from step 2), it will open the page in both Firefox and Epiphany (i.e. the browser that was originally set as default).
Edit
Some system info:
OS - elementary OS Hera
Ephemeral 7.0.4 from AppCenter
Firefox from Ubuntu repos
Epiphany from flatpak (I have also the Ubuntu/elementary OS default, but the flatpak takes precedence when launching the browser).
I noticed this funky bug - under certain circumstances, Ephemeral will open a page in two different browsers. Here are the steps to reproduce:
Edit
Some system info:
7.0.4
from AppCenter