: Hover over "Cast, save and share" (or "More tools") and click "Install page as app" . Confirm : Check the box "Open as window" and click Install .

Start with Option 1 (Install as an app). It takes 30 seconds and feels like magic. If you need offline storage of attachments, move to Thunderbird.

Right-click the Mail app icon in your taskbar and select "Pin to taskbar" for easy access.

Select (or Create shortcut and check the box "Open as window").

Click the (⋮) in the top-right corner. Go to Save and share (or More tools in older versions).