Effective August 9, 2026 · Applies to the Multi-Login Manager Chrome extension
Multi-Login Manager lets you keep multiple, separately logged-in sessions of the same website in one browser — for example three Instagram accounts, or several e-commerce seller accounts — without constantly signing in and out. This page explains what data the extension touches, where it lives, and what never happens to it.
Nothing leaves your device. Full stop. Everything below is stored locally, inside Chrome's own extension storage, on the machine where you installed the extension.
| Data | Where it lives | What's in it |
|---|---|---|
| Profiles, groups, website rules, settings | IndexedDB | Name, color, tags, notes, proxy configuration (no secrets), group membership |
| Cookie snapshots | chrome.storage.local (AES-GCM encrypted) |
Per-profile, per-domain cookie values, so each profile's session survives switching |
| Local storage snapshots | chrome.storage.local (AES-GCM encrypted) |
Per-profile, per-site key/value pairs the site itself stored |
| Window ↔ profile bindings | chrome.storage.session | Which profile owns which browser window/tab — cleared automatically when Chrome closes |
The extension requests broad host access (<all_urls>) and the cookies permission because session isolation has to work on any site you choose, not a fixed list. That access is used exclusively to read and write cookies for the domains you actively browse in a managed profile — never transmitted anywhere, never logged.
When you export a backup, it's a plain JSON file that downloads straight to your device — nothing passes through us. By default a backup contains profile configuration only: no cookies, no tokens, no passwords. Restoring a default backup on a new device will require signing in again inside each profile.
Settings includes an optional, off-by-default checkbox to include session data (cookies and local storage) in an export, so you can hand a profile to another one of your own devices without any cloud service. When you turn it on, the resulting file is as sensitive as a password — the extension tells you this directly next to the checkbox, and it's opt-in every time.
Multi-Login Manager is a general-purpose browser productivity tool not directed at children, and knowingly collects no information from anyone, of any age — see "What we never collect" above.
If this policy changes, the effective date at the top of this page will change with it. Because the extension has no account system, we can't notify you directly — check back here if you want to review the current version.
Questions about this policy? Multi-Login Manager is an independent, open project with no company behind it. The source code — including every file referenced on this page — is the authoritative reference for exactly what the extension does.