Firefox Nightly
Release Notes

Starting with Firefox 115, Nightly supports a new “Copy Link Without Site Tracking” context menu action which prevents disclosure of identifying or sensitive information by removing superfluous query and tracking parameters from the copied links.

Starting with Firefox 117, recently closed tabs now persist between sessions for Nightly users that don't have automatic session restore enabled. Manually restoring a previous session will continue to reopen any previously open tabs or windows.

Starting with Firefox 117, Nightly builds now support adding images when editing PDFs in addition to adding text and drawing.

On Firefox for Android, printing page content from the browser or share menu is now available.

On Firefox for Android, pinned user shortcuts now open in an existing tab if it already has the same URL.

Web Audio in Firefox now uses the FDLIBM math library on all systems to improve anonymity with Fingerprint Protection.

Starting with Firefox 118, Nightly now supports UI setting that enables the user to opt-in into GPC, a privacy signal that tells the websites that the user doesn’t want to be tracked and doesn’t want their data to be sold.

The visibility of fonts to websites has been restricted to system fonts and language pack fonts to mitigate font fingerprinting in Private Browsing windows.

On Firefox for Android, the clearing of site data was moved from "Browsing history and site data" to the "Cookies and site data" menu item.

Starting with Firefox 116, we are enabling for nightly users a prototype Federated Credential Management implementation, a Web Platform API that allows users to login to websites with their federated accounts in a privacy preserving manner.

Starting with Firefox 117, partial support for the custom highlight API is now available in Nightly builds, allowing web developers to give ranges an appearance.

10 new CSS math functions are now supported: round, mod, rem, pow, sqrt, hypot, log, exp, abs, sign.