What browser cores are

Browser cores are the engines behind Multilogin profiles – based on Chrome (Mimic) and Firefox (Stealthfox). They control how your profiles render websites, interact with tools, and stay stealthy.

How core updates work

1. Multilogin tracks new browser core releases
2. We roll out updates 1–2 weeks later
3. Your profiles are updated automatically when you start them

Why we don’t update instantly

We hold off on browser core updates for 1–2 weeks after their official release. Why? Because patience = protection.

• Avoid risky bugs: fresh Chrome/Firefox releases often come with hidden flaws. We wait until they’re fixed
• Prevent crashes: early adopters often run into unexpected issues. We’d rather you have a smooth, stable experience
• Reduce bans: some sites flag new browser versions as suspicious. Waiting helps you blend in naturally
• Keep your tools working: frameworks like Puppeteer and Selenium need time to catch up. Early updates can break automation setups

How to check the latest core version

Take a look in the bottom-right corner of the main app window.

FAQs

Can I force a browser core update sooner?

No – updates are rolled out by Multilogin after internal testing. It's all about safety first.

Will this delay cause compatibility issues?

Quite the opposite! It keeps you in sync with stable, trusted setups.