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Preview of ContainSite

ContainSite by salmutt

Per-container fingerprint isolation — each container gets its own device identity

5 (1 review)5 (1 review)
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Extension Metadata

About this extension
Every website you visit is automatically placed in its own isolated container with a unique, deterministic device identity. Sites cannot share sessions, cookies, or correlate you through browser fingerprinting.

Features:
- Automatic per-site containers — no configuration needed
- 12 spoofed fingerprint vectors:
Canvas, WebGL, Audio, Navigator, Screen, Timezone, WebRTC, Fonts, Client Rects, Plugins, Battery, Connection
- Cross-site navigation automatically switches containers
- Options page to toggle individual vectors, whitelist domains, and manage containers
- Auth-aware — login redirects stay in the originating container

Works alongside Firefox Multi-Account Containers. No external dependencies.
Rated 5 by 1 reviewer
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Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
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Version
0.2.0
Size
31.65 KB
Last updated
4 days ago (Mar 1, 2026)
Related Categories
  • Privacy & Security
  • Tabs
License
GNU General Public License v3.0 only
Version History
  • See all versions
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