If you really need it not to be killed, you can always open split screen before opening the second app, or just open it in free-form mode. But this is more of a workaround than solution.

Nothing wrong with it. It is just an alternative, for those who are more concerned about privacy and security than an average user.

You should be able to find it on ApkPure

Sould browser have one. It also have something similar fpr browsing images on a webpage.

I didn’t see any option to make it automatic though