Do not close main window upon closing last tab

I second this! Any updates on this so far?

Seconded. As someone who prefer to work in full screen mode this is a must.

Vlad No, but I enable this option in other browsers wherever possible.

hsu What other browsers have this option? Can you post a screenshot of how it is labeled?

This is how Vivaldi labels it:

In addition, this is also the default behavior in Arc browser.

Really hope this could become an option in Orion!

My personal daily driver is LibreFox, and use Chrome/Edge for work. Seldom use Safari other than occasional testing.

Closing the last non-pin tab closing Orion is so confusing🤦‍♂️

An option to change this behavior is more than welcome!

Just notice in Version 0.99.130.2-beta (WebKit 621.1.2.111.4), closing last non-pin tab has 2 different behaviour:

Last non-pin tab active, cmd-w will minimize Orion
Middle click or click "x" of the last non-pin tab will close the non-pin tab, then open a new one

Additionally, in Safari:

If pin tab is present, closing last non-pin tab(even it is a start page)
- with mouse action, will go to pin-tab
- ctrl-w will minimize Safari
Closing last tab (pin or non-pin)
- with mouse action, will close the existing tab and open start page
- ctrl-w will minimize Safari
If last tab is start page, and there is no pin tab
- Cannot close tab with mouse action
- ctrl-w will minimize Safari

So in this case, Safari mouse action align with OP and my expectations, but not ctrl-w.

PS: mouse action = middle click or clicking the "x" of the tab bar.