Firefox Engine Optimization
Built on a deeply optimized Firefox engine for realistic browser environments with strong compatibility, stability, and security.
Firefox-based antidetect browser
CosLogin Antidetect Browser
One device, multiple browser identities. CosLogin creates isolated browser profiles with unique fingerprints, cookies, local storage, and proxy configurations so every account runs independently and naturally.
Firefox
Optimized browser engine
Identities
Separate real-device profiles
Scale
5 to 5 million accounts
Why choose CosLogin
Realistic, isolated environments for secure multi-account operations
Built on a deeply optimized Firefox engine, CosLogin combines browser isolation, realistic fingerprint behavior, proxy support, automation, and team access control.
Isolated Browser Environments
Each profile runs independently with isolated cookies, cache, local storage, and browsing data to reduce account linking.
Advanced Fingerprint Protection
Realistic device parameter simulation creates highly authentic browser fingerprints that closely mimic real user environments.
Multi-Account Anti-Detection
Operate multiple accounts from a single device while reducing detection risks and improving account stability.
Automation & API Support
Compatible with Selenium, Playwright, Puppeteer, and API integrations for automation, bulk actions, and scalable workflows.
Team Collaboration & Access Control
Enable role-based permissions, environment sharing, and centralized workspace management for efficient team operations.
What is CosLogin?
A professional multi-account management browser built on Firefox
CosLogin creates secure and isolated browser environments for every account. Each profile behaves like a fully independent device, with complete separation from other profiles.
Create isolated browser environments with separate cookies, cache, local storage, and browsing data.
Assign proxy settings per environment so each account can operate with its own network configuration.
Connect Selenium, Playwright, Puppeteer, and API integrations for bulk operations and scalable workflows.
Industries & use cases
Made for ecommerce, advertising, Web3, research, and multi-account teams
Ecommerce
Manage Amazon, eBay, Shopee, Lazada, Etsy, and other marketplace accounts with secure multi-store workflows.
Social Media Marketing
Operate multiple accounts across Facebook, TikTok, Instagram, X, and other social platforms.
Affiliate Marketing
Designed for affiliate marketing, traffic operations, and large-scale account management.
Advertising
Manage multiple ad accounts across Facebook Ads, Google Ads, TikTok Ads, and other platforms.
Web3 & Crypto
Support wallet isolation, multi-wallet management, airdrop tasks, and on-chain interactions.
Data Collection & Automation
Use automation scripts and API integrations for data collection, bulk actions, and scalable workflows.
Retail Price Monitoring
Run market research, competitor tracking, and cross-region price monitoring with more accurate regional insights.
Brand Protection & Monitoring
Monitor regional search results, ads, and brand mentions to detect misuse and track market activity.
Journalism & Research
Collect and analyze public information in isolated browser environments for research workflows.
Pricing
Simple plans for individuals and teams
Start with profile isolation basics, then scale seats and workspace capacity as operations grow.
Free
For evaluating secure browser profiles.
$0/ month
- Limited browser profiles
- Local profile storage
- Basic proxy setup
- Community support
Pro
For operators managing daily workflows.
$19/ month
- Expanded browser profiles
- Cloud profile sync
- Proxy status management
- Priority email support
Team
For growing teams and agencies.
Custom
- Team workspaces
- Seat and role management
- Shared profile operations
- Dedicated onboarding
FAQ
Common questions
Yes. CosLogin Browser is built on a Firefox-based core for a familiar, compatible browser environment.
Yes. Profiles can be configured with HTTP and Socks5 proxy settings, with status shown inside the workspace.
Yes. Team workspaces are designed for shared profile management, seat allocation, and operational handoff.
Cloud sync is part of the Pro and Team workflow for keeping profile configuration available across trusted devices.
Windows is the primary download target. macOS and Linux cards are reserved for future releases.
CosLogin supports creating and managing multiple independent browser environments on the same device, each with its own data, configuration, and proxy settings.
Friendly links
Friendly links
Useful ecosystem links for browser workspace users.
Contact
Bring browser profile operations into one secure workspace.
Talk to the CosLogin team about downloads, partner listings, and team workspace needs.
Email Support
Send product questions, download feedback, and business cooperation requests to the support mailbox.
support@coslogin.comTelegram
Add CosLogin Browser on Telegram or scan the QR code to contact us.
https://t.me/CosLoginBrowser
Add the WeChat account or scan the QR code to talk with CosLogin support.
coslogin