Understanding Browser Sandboxing - Why Platforms Can't See Outside Their Tab

I keep hearing about ‘browser sandboxing’ but I’m not sure I understand it. Can someone explain in simple terms why interview platforms can’t see what’s running on my computer?

Browser Sandboxing Explained Simply

Browser sandboxing is a security feature built into all modern browsers (Chrome, Firefox, Safari, Edge). Here’s what it means:

The Sandbox Concept:

Imagine every browser tab as a sealed room. The website in that tab can do whatever it wants inside the room, but it cannot:

  • Open the door and walk into other rooms (other applications)
  • Look through windows to see what’s outside (your desktop)
  • Listen through walls to hear other conversations (other processes)

Why This Exists:

This security exists to protect YOU. Without sandboxing:

  • Malicious websites could read your files
  • Ads could monitor everything you do
  • Any webpage could install malware

What This Means for Interviews:

Interview platforms operate under the same restrictions as any website. They cannot break out of their sandbox to see:

  • What applications you have open
  • What’s in your system’s memory
  • What processes are running
  • What’s on parts of your screen they haven’t been given access to

Interview Coder operates entirely outside this sandbox, making it invisible to any browser-based interview platform.