With Firefox 140 transitioning to the stable channel as the latest Extended Support Release (ESR), Mozilla has now rolled out Firefox 141 to the beta channel for user testing. This upcoming version focuses on improved memory usage for Linux systems, eliminating the need for a restart after updates are applied through a package manager.
A key enhancement in Firefox 141 is the ability to manage pinned tabs more intuitively; users can now drag tabs directly into the pinned tabs area to pin them, or drag them out to unpin. The New Tab page has also received a facelift, with the previous wheel icon replaced by a “Customize” button, featuring a smooth fade effect for changes.
Developers will appreciate several technical updates in this release. Firefox 141 reintroduces support for CHIPS (Cookies Having Independent Partitioned State), enabling better privacy during navigational backward movements after a user has signed out. It also implements the closedby attribute and its respective closedBy property, providing more granular control over session states.
Additionally, enhancements for web developers include support for the webkitdirectory HTML attribute on Firefox for Android and the i18n.getPreferredSystemLanguages method for add-on developers to retrieve preferred OS locales.
Mozilla is set to officially release Firefox 141 on July 22, 2025. For those interested in testing it before the public launch, the beta version is available for download from the official website, although it is advised not to use it for production work.
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