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What Is a Browser Profile? Chrome Profiles vs Containers vs Antidetect Profiles (2026)
What is a browser profile?
A browser profile is a set of personal data that your browser keeps in its own folder: cookies, history, bookmarks, saved passwords, installed extensions and settings. Chromium's documentation describes each profile as a subdirectory of the user data directory, holding things like history, bookmarks and cookies.
Switch to another profile and the browser opens as if it were a different person's: different logins, different history, different extensions. That is why people use profiles to keep work and personal browsing apart, or to stay signed in to two accounts of the same site at once.
What a Chrome profile keeps apart
Google's help page says a profile keeps bookmarks, history, passwords and other settings separate. Cookies and site data are kept in the profile's folder too, so a login in one profile doesn't appear in another.
What stays the same in every profile:
- Your IP address, because all profiles use your computer's connection.
- Your operating system, screen and hardware.
- Your browser version and the fonts installed on the machine.
That second list matters. EFF explains that browser fingerprinting relies on your browser's configuration and settings, not on cookies, so clearing or separating cookies doesn't change it. A profile separates your data, not your identity.
Profile, container, incognito or antidetect: who separates what
| Item | Chrome profile | Firefox container | Incognito or Guest window | Antidetect profile |
|---|---|---|---|---|
| Cookies and site data | Separate | Separate (cookies, local storage, IndexedDB, cache) | Temporary, discarded on close | Separate |
| History and bookmarks | Separate | Shared, not separated | History isn't kept; bookmarks and downloads stay | Separate |
| IP address | Same as your computer | Same as your computer | Same as your computer | Its own proxy per profile |
| How websites see your browser and device | Same as your computer | Same as your computer | Same as your computer | Its own settings per profile |
| Typical use | Work vs personal | Several logins in one window | Leave no trace on a shared PC | Keep many accounts fully apart |
Mozilla's documentation lists exactly what containers isolate (cookies, local storage, IndexedDB, HTTP cache and image cache) and what they don't: history, bookmarks and TLS security exceptions, with saved passwords and form data intentionally left shared.
A fourth kind of separation happens automatically
Modern browsers also partition storage by site to limit cross-site tracking. Firefox keys stored data by the resource's origin plus the top-level site (on by default since Firefox 103), and Chrome enabled storage partitioning for all users from version 115. This protects you from embedded third parties following you around. It is not a way to keep your own accounts apart.
Profile vs Google account
A profile is a local container. A Google account is an identity. You can sign two profiles into two different Google accounts, into the same account, or into none. Signing in to sync is a separate choice.
Is a profile a security boundary?
No. A profile is a way to organise data, not a lock. Profile folders sit on your disk like any other files, so anyone who can use your computer account can open them. Use your operating system's accounts and disk protection for real separation between people.
Try it yourself in five minutes
- Create a second Chrome profile and sign in to the same website with a different account in each profile. Both stay logged in at the same time.
- In each profile, open
chrome://versionand compare the Profile Path lines. They point to different folders. - In each profile, look up your IP address, and run EFF's Cover Your Tracks. The IP address and the browser characteristics match, because both profiles run on the same computer.
That last step is the point: the data is separate, but the identity websites can measure is not.
Choose in 60 seconds
Common mistakes
- Assuming a profile hides your IP. It doesn't; every profile shares your connection.
- Putting several clients in one profile. Their logins, cookies and history mix.
- Giving every profile the same proxy. Accounts then share an address, even if their data is separate.
- Not naming profiles. Once you have more than a few, clear names prevent logging in to the wrong account.
- Ignoring extensions. Extensions installed in a profile can read that profile's pages, so install only what you trust.
Where ADSSPEED fits
An ADSSPEED profile goes beyond the data a normal browser profile keeps apart.
- Its own environment. Each browser profile has its own cookies and storage, its own device and browser settings, and its own proxy.
- Browser and phone profiles. You can run many browser profiles and Android phone profiles from one app.
- Your data stays with you. According to the product page, your data stays on your own machine and cookies aren't sent to a server.
Frequently asked questions
Are Chrome profiles completely separate?
They separate your data: bookmarks, history, passwords and other settings, plus cookies and site data, because each profile is its own folder. They don't separate anything about your computer: the IP address, operating system, screen, fonts and browser version are the same in every profile.
Do Chrome profiles share cookies, history or extensions?
No. Each profile keeps its own cookies, history and installed extensions, so a login in one profile doesn't appear in another. What they share is the machine and the network they run on.
What is the difference between a Chrome profile and a Google account?
A profile is a local container for browser data. A Google account is an identity you can sign in with. You can sign several profiles into different Google accounts, the same account, or none.
Where is a Chrome profile stored?
Each profile is a subfolder, often called Default, inside Chrome's user data directory. Open chrome://version and read the Profile Path line to see exactly where the profile you are using lives.
Chrome profiles or Firefox containers: which separates better?
Containers separate cookies, local storage, IndexedDB and cache inside one window, but history and bookmarks stay shared, and saved passwords are intentionally not separated. Profiles separate more of the data, but each profile lives in its own window set. Neither changes your IP address or fingerprint.
Does a browser profile change my IP address?
No. A normal profile uses your computer's connection, so every profile shows the same IP address. To use a different address per profile you need a proxy for each one.
Sources
Related guides
Run Android devices and browser profiles on your own PC
ADSSPEED manages many browser profiles and Android phone profiles from one app, each with its own device configuration, proxy and automation.