Merge pull request #15523 from newrelic-forks/add-browser-agent-v1.249.0

Browser Agent v1.249.0 Release Notes

src/content/docs/release-notes/new-relic-browser-release-notes/browser-agent-release-notes/browser-agent-v1.249.0.mdx

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+---
+subject: Browser agent
+releaseDate: "2023-12-14"
+version: 1.249.0
+features: ["Allow empty string for Session Replay masking value"]
+bugs: ["loader missing sub-resource integrity hashes","Fix API Warning Messages","traceids not random when using `webcrypto`"]
+security: []
+---
+
+## v1.249.0
+
+### Features
+
+#### Allow empty string for session replay masking value
+Allow empty strings to be provided for session replay masking values, which helps the UI/API provide sane fallbacks for never-set values.
+
+### Bug fixes
+
+#### loader missing sub-resource integrity hashes
+Sub-resource integrity hashes were not being properly generated and included in the loader for async chunks related to session replay. This would cause a warning to appear in the browser console, but would not block those chunks from loading. This would have only affected customers taking part in the session replay limited preview.
+
+#### Fix API warning messages
+Fix warning messages given by API calls made before the agent has initialized.
+
+#### Traceids not random when using `webcrypto`
+Fix non-random hexadecimal generation when using the webcrypto api, which in turn creates non-random traceIds, that always end in 00.
+
+## Support statement:
+
+New Relic recommends that you upgrade the agent regularly to ensure that you're getting the latest features and performance benefits. We no longer support older releases 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 roll 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), v1.249.0 of the Browser agent was built for and tested against these browsers and version ranges: Chrome 110-119, Edge 110-118, Safari 15-16, and Firefox 110-119. For mobile devices, v1.249.0 was built and tested for Android Chrome 100-119 and iOS Safari 15.5-16.2.