Version 154.0.1, first offered to Release channel users on August 25, 2026

Fixed slower access to saved passwords and unexpected Primary Password prompts caused by recent changes to password storage. (Bug 2064411, Bug 2065593, Bug 2063993)

Fixed an issue where addresses were failing to autofill on some sites. (Bug 2065145, Bug 2063599)

Fixed Firefox adding a new Start Menu shortcut on Windows every time it started. (Bug 2064652)

Fixed an issue where connections to local network devices were failing without a permission prompt on some sites loaded over HTTP. (Bug 2059274)

Fixed a crash that could occur when opening intranet sites that are configured to link to files on a local network share. (Bug 2064648)

Fixed an issue on Windows where tab titles were cut off at the start when the system font was MS UI Gothic. (Bug 2056856)

For users with vertical tabs enabled, the sidebar may not persist across Firefox restarts. Vertical tabs can be re-enabled after the restart by clicking the sidebar toolbar button. We are currently working on a fix. (Bug 2065431)

When toolbars are hidden in fullscreen mode (the default on Windows and Linux), the vertical tabs sidebar does not appear when moving the cursor to the left edge of the screen. As a workaround, move the cursor to the top of the screen to reveal both toolbars and sidebar together. Alternatively, you can also right-click the toolbar and uncheck the Hide toolbars option. We are currently working on a fix. (Bug 2064638)