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Browser agent v1.306.0

December 16, 2025Download

v1.306.0

Features

Control log API through separate RUM flag

Logs captured by the newrelic.log method will now be configurable through settings and controlled separately from wrapped logs. This allows one to be disabled without affecting the other, as in the case that only newrelic.log is desired and not auto instrumented console.

Ensure responseStart is valid before relying on onTTFB

Adds an extra validation step to ensure that responseStart of the nav timing entry is valid before relying on onTTFB to return valid data. The web-vitals library depends on that value to operate correctly, and without a valid TTFB response, the agent will not send the RUM call. This change ensures that fallback measures are taken when responseStart is invalid, to ensure a RUM call is sent more reliably, which helps compatibility with unsupported frameworks such as ElectronJS.

Bug fixes

Remove linebreak syntax from webpack output

Removes the newline character in webpack output to avoid issues with copy-pasting our script as a string inside code.

Support statement

New Relic recommends that you upgrade the agent regularly to ensure that you're getting the latest features and performance benefits. Older releases will no longer be supported when they reach end-of-life. Release dates are reflective of the original publish date of the agent version.

New browser agent releases are rolled out to customers in small stages over a period of time. Because of this, the date the release becomes accessible to your account may not match the original publish date. Please see this status dashboard for more information.

Consistent with our browser support policy, v1.306.0 of the Browser agent was built for and tested against these browsers and version ranges: Chrome 133-143, Edge 133-143, Safari 17-26, and Firefox 135-145. For mobile devices, v1.306.0 was built and tested for Android OS 16 and iOS Safari 17-26.

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