Firefox 155 speeds up web connections with Happy Eyeballs v3 and QUIC v2

📅 1 September 2026 at 13:51 UTC📰 Cyber InsiderView original source ↗

Mozilla has released Firefox 155, introducing networking changes designed to reduce connection delays, alongside new privacy indicators and Smart Window improvements. The new release adds Happy Eyeballs v3 and QUIC v2 support for HTTP/3, both aimed at helping Firefox establish faster connections to websites. Happy Eyeballs v3 changes how Firefox chooses between available network paths … The post Firefox 155 speeds up web connections with Happy Eyeballs v3 and QUIC v2 appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis

🔍Threat Overview

Mozilla released Firefox 155 with new networking changes and features, including Happy Eyeballs v3 and QUIC v2 support for HTTP/3, aimed at reducing connection delays and improving performance.

⚙️Technical Details

💥Impact Assessment

Severity: low

Who Is at Risk

Users of Firefox 155 and potentially other browsers that support HTTP/3

🛡️Recommended Actions

1Monitor network traffic for potential QUIC-related issues

2Disable network.http.happy_eyeballs_enabled in Firefox's Preferences enterprise policy if necessary

3Update captive-portal detection configurations to avoid blocking UDP traffic

📦Affected Products

Product Name: FirefoxAffected Software:Firefox

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