Closing a private window does not delete the file you just downloaded. It also does not undo a change you made while signed in to a website.
Those two details matter more than the word “private” on the browser window. Before deciding whether a private session fits what you need, separate three places where information can exist: the browser, the device’s files, and your website account.
Browser history is only one part of the picture
Chrome’s Incognito mode gives you a separate browsing session. When you finish that session, Chrome does not retain its browsing history or site data in the same way as an ordinary window. The sites you visit and whoever manages your network may still be able to observe activity. Signing in also lets that website identify the account you are using. Google’s Incognito explanation sets out those limits.
That makes a private window useful for a fairly specific purpose: reducing what the browser keeps from a session on the device. It is not a promise that nobody else can know you visited a site.
A useful question to ask yourself is: “Who am I trying to keep this separate from?” Someone using the same browser tomorrow is a different case from a website you have deliberately logged into.
The downloaded file stays
Firefox explicitly distinguishes a download-history entry from the actual file. Ending private browsing removes the session’s download-list entries, but files saved to the computer remain. Browser bookmarks created during that session can remain too. Mozilla documents what Firefox saves.
For example, suppose you save a file into Downloads and then close every private window. Later, someone opens the file manager and looks in Downloads. Closing the browser did nothing to remove that file.
Check the folder you actually selected when saving. Do not rely on the browser’s history screen as an inventory of what is still on the device. If you move a file to a folder that another app backs up or shares, review that app’s behaviour separately; the browser cannot make that decision for it.
A browser bookmark and EroSearch’s Saved page are different things
The word “bookmark” gets used for two separate features:
- A browser bookmark is the page address you save with the browser’s own bookmark command.
- A saved album in EroSearch is an entry you create using the album’s bookmark control.
In EroSearch, saving while signed out uses storage in that browser. Signing in enables account storage. A bookmark successfully saved to the account does not disappear merely because you close a private window: the request has already changed the account’s saved list.
Conversely, a signed-out collection created only inside a private session should not be treated as durable storage. Browser local storage in private sessions is cleared when the private session ends. MDN’s local-storage reference explains this distinction.
If keeping a collection matters, verify where it is saved before closing the session. Our missing saved albums guide explains how to check the browser, account, and active filter without immediately deleting anything.
Signing out and deleting data do different jobs
Signing out ends your access through that browser session. It is not a command to delete every saved album from the account. Removing an album from the Saved page is a separate action; deleting an account is a separate action again.
The same caution applies in the other direction. Clearing a browser’s site data can sign you out and remove local website storage. It does not, by itself, tell a website to erase its account database. Firefox’s site-storage controls let you inspect and remove data for individual sites, which is more targeted than clearing everything.
If an album still appears after you sign in again, that is not evidence that the private window “failed.” It may simply be an account bookmark being loaded as intended.
Before handing a shared device back
Take a moment to check the things you actually changed:
- End the private session using your browser’s controls, including any other private windows still open.
- Inspect the download folder if you saved a file.
- Check whether you created a browser bookmark or saved a password.
- If you changed a website account, decide whether that change should remain there.
On a work or school device, a private window does not override the organisation’s management software or rules. Use a device you control for activity you need to keep separate from that organisation.
There is no single “clear everything everywhere” switch in a browser. Knowing which of these places holds the information is what lets you make an informed choice.