System requirements
| Requirement | |
|---|---|
| Windows | Windows 10 or Windows 11, 64-bit |
| Browser engine | Chrome 150 (fingerprint-chromium, open source, BSD-3 license) |
| Engine download | Inside the app, in Settings → Kernels, checked against a SHA-256 checksum |
| Where data lives | A local database on your PC, with secrets encrypted and the key protected by Windows DPAPI |
| Installer | A standard setup file that lets you pick the install folder and adds Desktop and Start menu shortcuts |
Install Multime on Windows
- Download the installer. Get the Windows version from the download page. The file name ends in
-win-x64-setup.exe. - Run it. Double-click the setup file. Until the app is code-signed, Windows may show a SmartScreen message that says "Windows protected your PC". Click More info, check that the file is the one you downloaded from Multime, then click Run anyway.
- Choose where to install. The installer lets you keep the default folder or pick another one. It adds shortcuts to the Desktop and the Start menu.
- Open Multime and download the engine. Go to Settings → Kernels and download Chrome 150. Multime checks the download against its SHA-256 checksum before using it. Profiles can't open until an engine is installed.
- Create your first profile. Add a proxy, leave time zone, language and location set to match the proxy IP, and open it.
SmartScreen warns about apps that it doesn't yet recognize, and unsigned apps are among them. The warning doesn't mean Windows found a problem in the file.
Canvas masking on the Windows engine
There is one Windows-specific limit you should know about. On the Windows engine (Chrome 150), Multime switches canvas masking off automatically. That engine build breaks text measuring when canvas masking is on, and pages can draw text wrong. In this engine, the same switch also covers the masking of WebGL images, so that is off too.
What stays on:
- Audio masking
- Masking of element sizes (ClientRects)
- Graphics card info (masked or real, your choice)
- CPU cores from the seed, or a custom number
- Time zone, language and location that follow the proxy
- WebRTC set to go through the proxy, replace the IP, be disabled or be real
- Port-scan protection, which stops websites from probing services on your computer or network
The Mac engine (Chrome 152) doesn't have this limit. If canvas masking matters for your work, keep that in mind when you choose a computer. See Multime for Mac.
What a Windows profile can show to websites
New profiles show Windows by default, matching your PC. You can change that per profile.
| Setting | Options |
|---|---|
| Operating system shown to websites | Windows 10 or 11, macOS or Linux |
| Browser brand | Chrome, Edge, Opera or Vivaldi |
| User agent | Automatic, matching the engine |
| Time zone, language, location | Match the proxy IP, or set by hand |
| Interface language | The browser's menu language |
| Graphics card info | Masked or real |
| Other | Do Not Track, hardware acceleration, WebGPU |
Each profile's seed drives its masked values, so a profile looks the same every time it opens and two profiles never share values. Screen size is always your real screen. Media devices, speech voices and custom font lists aren't masked.
Windows-specific details
- DPAPI protects the key. Secrets such as passwords, 2FA keys, proxy passwords and cookies are encrypted with AES-256-GCM. The key is protected by Windows DPAPI, tied to your Windows account. Copying Multime's database to another PC doesn't reveal those secrets.
- Proxies with a login. Chromium can't always handle proxy usernames and passwords itself. Multime runs a small local relay for each profile, so HTTP, HTTPS, SOCKS5 and SSH proxies with a login work, and DNS goes through the proxy.
- The local API. Scripts on your PC can open and close profiles through the local API on port 50325, with an API key required by default. See automation.
Typical Windows setups
A dropshipping seller with a desktop PC. She runs 60 profiles on the Solo plan, grouped by store. Each store's profile has its own proxy, saved login and 2FA secret. She bulk-created them from a spreadsheet with one row per store. Marketplace and ad platform rules still apply to each account.
A VA on a Windows laptop. An agency owner hosts the team workspace on a Mac. The VA installs Multime on Windows, signs in to the owner's workspace, and opens only the profiles the owner assigned. Because team profiles are set to the "Auto" engine, they open on the VA's Chrome 150 engine without changes. When the VA closes a profile, its data goes back to the owner's Mac. See team sharing.