Do I have to save my note?
No. It autosaves 400 ms after you stop typing, and the Saved at timestamp under the editor confirms each write. There is no save button because there is nothing to press: if the timestamp is updating, your text is on disk.
Will I lose my note if I close the tab?
Not under normal use. The note is written to localStorage, which persists across tab closes, browser restarts, and reboots. The only way to lose it is to clear your browsing data, use a private window, or use a different browser or device.
Can I open the same note on my phone?
No. localStorage is tied to one browser on one device. There is no sync and no account, which is exactly why nothing you type here is ever sent anywhere. If you need the note elsewhere, copy the text out and paste it into something that syncs.
Is a browser notepad safe for passwords or private information?
It is private in the sense that nothing is uploaded, but localStorage is not encrypted and any script running on this origin, or anyone with access to your unlocked machine, can read it. It is fine for a shopping list or a draft. It is not a password manager.
How do I get my note out of the browser?
Select all the text in the box and copy it. There is no export or download button. Do that regularly if the note matters, because a single Clear browsing data will take it with no confirmation and no way back.
Why does Clear note not ask me to confirm?
It does not, and there is no undo. Pressing Clear note wipes the text and removes the localStorage key immediately. Copy anything you want to keep first.