How websites recognize the same device
| Signal | Examples | Can you reset it? |
|---|---|---|
| Stored identifiers | Cookies, localStorage, IndexedDB, cache | Yes, but you are signed out |
| Browser fingerprint | User-Agent and Client Hints, screen, time zone, language, fonts, Canvas, WebGL, Audio | No — it is computed from your device |
| Network | Exit IP and location, WebRTC candidates, DNS | Yes, with a proxy |
| Account and behavior | Login, phone number, payment method, usage patterns | Not a browser matter |
What an antidetect browser actually does
1. Isolate data
Every profile has its own browser data directory: cookies, cache, extension data and history never mix, and they persist between sessions.
2. Keep fingerprints consistent
Each profile gets a coherent device identity — OS, screen, GPU, time zone and rendering signals that agree with each other and stay stable over time. Good implementations change the browser engine rather than injecting scripts into pages.
3. Separate networks
Each profile can use its own proxy, with time zone and language matched to the exit and WebRTC/DNS prevented from bypassing the proxy.
Antidetect browser vs incognito, browser profiles, VPN and VMs
| Option | Data isolation | Different fingerprints | Separate IPs | Best for |
|---|---|---|---|---|
| Browser profiles (e.g. Chrome profiles) | Yes | No — same device | No | Separating personal and work browsing |
| Incognito window | Temporary | No | No | One-off visits |
| VPN / system proxy | No | No | One shared exit | Changing the whole computer’s exit |
| Virtual machines / extra computers | Yes | Yes (real) | Needs setup per machine | A few fully separate systems |
| Antidetect browser | Yes, per profile | Yes, per profile and consistent | Per profile | Many independent identities on one computer |
Common, legitimate uses
- Managing multiple authorized accounts for e-commerce stores, social media and content teams.
- Ad verification and landing-page checks from different regions.
- Web development and QA with reproducible language, time zone and login states.
- Privacy and compatibility research.
- Letting scripts or AI agents work only inside dedicated profiles.
What it cannot do
- It cannot guarantee that accounts will never be linked or restricted — platforms also use account, payment and behavioral signals.
- Proxy quality matters as much as the fingerprint: datacenter or shared IPs and mismatched time zones stand out.
- Changing fingerprints constantly looks abnormal; long-lived profiles should keep one identity.
- Use it lawfully and within each website’s terms. It is a browser, not a license to commit fraud or impersonate others.
How to choose an antidetect browser
| Area | What to check |
|---|---|
| Platforms | Windows and macOS? Native on Apple Silicon? |
| Kernel | Which Chromium version, how are updates shipped, can profiles pin a version? |
| Data location | Are profiles stored locally or in the vendor’s cloud? How do you migrate? |
| Free tier | How many profiles are free and which features are missing? |
| Fingerprints | Complete device templates or random per-field values? Are limits documented? |
| Proxies | Protocols, authentication, exit checks, time zone matching, WebRTC protection? |
| Automation | API, window synchronization, schedules or MCP for AI agents? |
| Teams & price | Do you need shared profiles and permissions? Per-profile or per-device pricing? |
Try Prism Browser for free
Prism is a local-first antidetect browser for macOS Apple Silicon and Windows x64. Community is free with unlimited local profiles; Pro adds window sync, a local API, schedules and MCP. It does not offer cloud sync or team permissions. The app interface is available in 13 languages, including English.