fs.js Changelog https://developer.fullstory.com/browser/changelog/ Release notes for fs.js, the Fullstory browser capture script. Wed, 03 Jun 2026 00:00:00 GMT https://validator.w3.org/feed/docs/rss2.html https://github.com/jpmonette/feed en Copyright © 2026 Fullstory, Inc. <![CDATA[June 3, 2026]]> https://developer.fullstory.com/browser/changelog/2026-06-03/ https://developer.fullstory.com/browser/changelog/2026-06-03/ Wed, 03 Jun 2026 00:00:00 GMT Client-side guardrails for the Session UID feature.

Improvements​

  • Added client-side guardrails that improve the stability and reliability of the Session UID feature.
]]> Improvement <![CDATA[June 1, 2026]]> https://developer.fullstory.com/browser/changelog/2026-06-01/ https://developer.fullstory.com/browser/changelog/2026-06-01/ Mon, 01 Jun 2026 00:00:00 GMT Improved handling of misconfigured observers, plus a cleanup fix in the bundled script.

Improvements​

  • Improved observer configuration handling so that misconfigurations are gracefully rejected instead of throwing hard exceptions.

Bug fixes​

  • Removed a duplicate license comment that appeared in the bundled fs.js output.
]]> Improvement Bug fix <![CDATA[April 22, 2026]]> https://developer.fullstory.com/browser/changelog/2026-04-22/ https://developer.fullstory.com/browser/changelog/2026-04-22/ Wed, 22 Apr 2026 00:00:00 GMT Better Session UID lifecycle handling and network throttling for realtime recording.

Improvements​

  • Introduced throttling for realtime recording network requests to reduce load on backend services.

Bug fixes​

  • Improved session lifecycle controls for Session UIDs and fixed an issue with userId preservation during non-stateless startup.
]]> Improvement Bug fix <![CDATA[March 25, 2026]]> https://developer.fullstory.com/browser/changelog/2026-03-25/ https://developer.fullstory.com/browser/changelog/2026-03-25/ Wed, 25 Mar 2026 00:00:00 GMT More reliable capture of dynamically modified stylesheets.

Bug fixes​

  • Improved the reliability of capturing adoptedStyleSheets when a stylesheet is modified without explicitly reassigning it.
]]> Bug fix <![CDATA[March 11, 2026]]> https://developer.fullstory.com/browser/changelog/2026-03-11/ https://developer.fullstory.com/browser/changelog/2026-03-11/ Wed, 11 Mar 2026 00:00:00 GMT Viewport enter/exit tracking and expanded stylesheet capture.

New features​

  • Added support for capturing document-level mouseenter/mouseleave events to more accurately detect when a visitor's cursor enters or exits the browser viewport.
  • Expanded CSS capture to record adoptedStyleSheets.splice() calls, so stylesheets modified this way are faithfully replayed.
]]> New feature <![CDATA[March 10, 2026]]> https://developer.fullstory.com/browser/changelog/2026-03-10/ https://developer.fullstory.com/browser/changelog/2026-03-10/ Tue, 10 Mar 2026 00:00:00 GMT Faster initial load, a privacy scrubbing fix, and more accurate INP measurement.

Improvements​

  • Reduced initial load overhead by delaying creation of internal capture data structures until they're needed.

Bug fixes​

  • Fixed an issue in the console log scrubber's pattern matching that could cause some sensitive console output to not be masked.
  • Refined Interaction to Next Paint (INP) analytics to properly ignore interactions on elements excluded from capture.
]]> Improvement Bug fix <![CDATA[March 2, 2026]]> https://developer.fullstory.com/browser/changelog/2026-03-02/ https://developer.fullstory.com/browser/changelog/2026-03-02/ Mon, 02 Mar 2026 00:00:00 GMT Native Session UID configuration and expanded stylesheet capture.

New features​

  • Added native support for the Session UID API via the FS('init') configuration.
  • Added capture hooks for adoptedStyleSheets.push(), so dynamically added stylesheets are captured for replay.
]]> New feature