Parallel Accounts by GosuCode
Run multiple accounts side by side in isolated Firefox containers — no more logging in and out. Each saved profile gets its own container with separate cookies, storage, and an encrypted password vault with autofill.
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About this extension
Parallel Accounts lets you run multiple accounts for the same site at once, each in its own Firefox container (contextual identity) — cookies, localStorage, and login sessions stay fully isolated per profile.
Features:
Per-profile containers — every saved profile opens in its own isolated container tab, no cross-contamination between accounts
Encrypted password vault — credentials encrypted at rest (PBKDF2 + AES-GCM) behind a master password you set; the decryption key lives only in memory for the session, never written to disk
Autofill — once the vault is unlocked, saved credentials fill automatically on the profile's login page
CSV export/import — back up or migrate profiles, gated behind master password verification
Vault reset — forgot your master password? Reset clears saved passwords while keeping profile names, emails, URLs, and containers intact
One-click profile deletion with confirmation
Permissions used
contextualIdentities — create and manage one container per profile
cookies — check container-scoped cookie state
tabs — open and track each profile's isolated tab
storage — persist profiles and the encrypted vault
Firefox only — relies on the contextualIdentities API, which has no Chrome equivalent.
No data leaves your browser. No accounts, no telemetry, no external servers.
Features:
Per-profile containers — every saved profile opens in its own isolated container tab, no cross-contamination between accounts
Encrypted password vault — credentials encrypted at rest (PBKDF2 + AES-GCM) behind a master password you set; the decryption key lives only in memory for the session, never written to disk
Autofill — once the vault is unlocked, saved credentials fill automatically on the profile's login page
CSV export/import — back up or migrate profiles, gated behind master password verification
Vault reset — forgot your master password? Reset clears saved passwords while keeping profile names, emails, URLs, and containers intact
One-click profile deletion with confirmation
Permissions used
contextualIdentities — create and manage one container per profile
cookies — check container-scoped cookie state
tabs — open and track each profile's isolated tab
storage — persist profiles and the encrypted vault
Firefox only — relies on the contextualIdentities API, which has no Chrome equivalent.
No data leaves your browser. No accounts, no telemetry, no external servers.
I kept juggling multiple accounts on the same sites — work and personal email, test and prod logins — and was tired of logging in/out or using private windows every time. There are other container extensions out there but they're clunky: you manage containers manually, no saved profiles, no autofill, extra clicks every switch. I wanted something where you save a profile once and switching is a single click, with credentials filled in automatically. That's why I built this.
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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.
More information
- Add-on Links
- Version
- 1.1.0
- Size
- 35.26 KB
- Last updated
- 3 days ago (Sep 11, 2026)
- Related Categories
- License
- MIT License
- Version History
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