What is a disposable browser? Uses and limits
A disposable browser uses a temporary session. See what cleanup changes, what can remain, and how isolated browsing differs from incognito mode.
A disposable browser is useful because it gives one browsing task a temporary home. Close the session, and that browser state should not become the next session's starting point.
The word should not be treated as a universal technical standard. Products differ. Some run a browser away from the endpoint. Some only clear local state. Some add a private route. Always verify the actual boundary.
What disposable means
A disposable browser uses a temporary browser session. The product is designed to remove that session's retained browser state when it closes.
That can include cookies, cache, local storage, and authentication state held inside the temporary browser. Exact cleanup depends on the product. The definition does not guarantee a new fingerprint, a hidden identity, or deletion from every service the browser contacted.
Disposable browser versus incognito
| Question | Incognito mode | Isolated disposable browser |
|---|---|---|
| Where does the page run? | In the local browser | Depends on the product |
| What happens to local history? | Not retained after close | May never be created on the endpoint |
| Are cookies reused? | Not after all private windows close | Not if session cleanup works as described |
| Does it hide the network route? | No | Only if the product changes the route |
| Does it undo submitted actions? | No | No |
Incognito mode mainly changes what the local browser retains. An isolated disposable browser can also change where page code runs. That extra boundary is product-specific.
For a deeper comparison, read browser isolation versus incognito mode.
What disposal does not erase
- Data already submitted. A prompt, form, message, or upload can remain with the receiving service.
- Captured credentials. Closing a browser does not automatically revoke a password or token that another party obtained.
- Exported files. A file deliberately moved to the endpoint can persist there.
- Account correlation. Signing into the same account can link sessions even when local browser state changes.
- Provider records. The isolation provider and destination service may retain operational or account records.
When the boundary helps
An isolated disposable browser is useful when a page should not share the daily browser's state or execute on the endpoint. Examples include opening an unfamiliar link, separating a research session, and giving an agent a narrower browser step.
It is not a substitute for identity security, endpoint controls, download review, or human approval. The useful question is not whether the browser makes risk disappear. Ask which risk crosses its boundary.
Where Legba fits
Legba is a Chrome extension with two modes. Ghost gives you a private browser route. Shield opens a page in an isolated browser off your device.
Ghost changes the browser route. It is not the disposable isolation mode. Shield opens the page in an isolated browser off your device. The Shield session is destroyed when the tab closes.
Agent builders can use a ready skill for the same browser routing and isolation. That skill does not host the whole agent. The Chrome extension costs $10 a month, or $100 a year.
Continue the deep dive
Review browser isolation, private browsing, and the current Legba model.
What is browser isolation? The complete 2026 guide
Browser isolation separates web execution from a local device. This guide covers architectures, risk reduction, tradeoffs, and verification.
Six disposable browsers compared in 2026
Six disposable browsers compared by session destruction, operating model, setup requirements, and workflow fit. See the documented fit and tradeoffs for each.
How Legba browser isolation works
Shield runs the page in an isolated browser. That browser is off your device. See what happens when you open the tab. See what ends when you close it.
Free for 30 days. No card required.
Choose the boundary for each page
Legba is a Chrome extension with two modes. Ghost gives you a private browser route. Shield opens a page in an isolated browser off your device.
