Issue Description: I'm encountering a privacy tab setting issue with the Firefox app on my Android phone. When I close the Firefox app, all private tabs are automatically cleared and not retained. However, when I previously used Firefox on an iPhone (iOS 11), private tabs remained open after relaunching the app. Specific Questions: 1.Is there a setting in the Android version of Firefox to retain private tabs after closing the app? 2.Is this behavior due to Android's restrictions or Firefox's default configuration? 3.If no direct setting exists, are there workarounds (e.g., extensions or specific versions) to achieve this? My mobile phone is: Nothing Phone (3a) Pro Android 15 Any advice from users with similar experiences would be greatly appreciated. Thank you!