User-Agent

What Is a User-Agent?

A User-Agent is a string sent by your browser or application when making requests to websites, indicating your device type, operating system, and browser version.

Websites use User-Agent information to optimize page display, ensure compatibility, and enhance security.

Uses of User-Agent

1. Device identification – Helps websites distinguish between operating systems, browsers, and device types.
2. Content optimization – Adjusts layout or features based on device capabilities.
3. Security checks – Detects automated scripts or suspicious activity.

Risks in Multi-Account Operations

• Using identical or default User-Agent for multiple accounts can be detected as automation or the same user, increasing the risk of bans.
• Accounts without customized or randomized User-Agent are easier to be linked.

Example:

A social media manager handling 10 Facebook accounts using the same default browser User-Agent may trigger Facebook’s anti-fraud system.

With MasLogin Antidetect Browser, each account can have a unique User-Agent, ensuring environment isolation and anti-detection, reducing the risk of bans.

Who Should Care About User-Agent?

• Social media managers – Managing multiple accounts on Facebook, Instagram, TikTok
• Cross-border e-commerce sellers – Operating multiple Amazon, Shopee, eBay stores
• Affiliate marketers – Running multiple promotional accounts
• Privacy-conscious users – Wanting to stay anonymous online

Key Takeaway

User-Agent is a critical identifier used by websites to recognize users.

With MasLogin Antidetect Browser, users can customize or isolate User-Agent for each account, prevent account linking, and safely manage multiple accounts while protecting privacy.