Hot of the heels of the Firefox 140.0 Stable update, released earlier this week, is the first point update for the web browser. It addresses two non-security issues in the browser, one of them a crash at browser start.
The main issue fixed in the update is a startup crash that Mozilla says affected some users of the browser. It is caused by DLL injection. The bug report on Mozilla’s bug tracking website suggests that Mozilla reverted a change that it made in Firefox 140 to address the issue.
Mozilla lists Windows 10 specifically, which suggests that the bulk of users who experienced the crash use devices with Microsoft’s operating system.
The second fix resolves text contrast issues in the sidebar. They occurred if certain dark themes were used by the user. The text in the sidebar was barely readable in some instances. The update addresses the issue.
Firefox users who are affected by one or both of the issues may want to upgrade to the new version to resolve these issues. Just select Menu > Help > About Firefox to run a check for updates.
The browser should pick up the new version so that it gets downloaded and installed automatically. A restart is required to complete the upgrade process.
You find the original release notes for the Firefox 140.0.1 update here.
v.140.0.2…
Followed by Firefox 140.0.2, “first offered to Release channel users on June 27, 2025”, fixing “a startup crash on Windows experienced by some users. (Bug 1974259)”. C’est la vie.