Merge pull request #19669 from newrelic/add-browser-agent-v1.278.1

Browser Agent v1.278.1 Release Notes

src/content/docs/release-notes/new-relic-browser-release-notes/browser-agent-release-notes/browser-agent-v1.278.1.mdx

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+---
+subject: Browser agent
+releaseDate: "2025-01-08"
+version: 1.278.1
+features: []
+bugs: ["Make Metrics harvest only on EoL for new Harvester"]
+security: []
+---
+
+## v1.278.1
+
+### Bug fixes
+
+#### Make Metrics harvest only on EoL for new Harvester
+Prevent Metrics feature from harvesting on interval after changes in v1.278.0. This reverts its behavior back to sending only final harvests.
+
+## 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](https://docs.newrelic.com/docs/browser/browser-monitoring/getting-started/browser-agent-eol-policy/). 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](https://newrelic.github.io/newrelic-browser-agent-release/) for more information.
+
+Consistent with our [browser support policy](https://docs.newrelic.com/docs/browser/new-relic-browser/getting-started/compatibility-requirements-browser-monitoring/#browser-types), v1.278.1 of the Browser agent was built for and tested against these browsers and version ranges: Chrome 121-131, Edge 121-131, Safari 17-17, and Firefox 122-132. For mobile devices, v1.278.1 was built and tested for Android OS 15 and iOS Safari 17-18.1.