A fix release of Firefox 143.0.3 is available that fixes several issues:
- The timing of pinning a tab as a permanently visible shortcut after dragging it to the top of the tab bar has been adjusted. Drag-and-drop behavior for pinning has been adjusted to be more consistent with dragging a tab group.
- Resolved an issue that prevented some add-ons from being updated via the Add-ons Manager.
- Fixed a regression that prevented collapsing and expanding sections on a Firefox View page from working.
- Fixed a bug in the storage implementation for WebExtensions that caused a crash during startup when installing some add-ons, such as Notefox.
- Fixed an issue that caused the toolbar content customization interface (Application Menu [≡] > More Tools > Customize Toolbar) and some keyboard shortcuts to malfunction after opening the Extension settings page after installation.
- Eliminated long delays (~5 seconds) when loading some websites when working from networks that block UDP packets.
- Fixed a vulnerability (CVE-2025-11152) that allowed sandbox isolation to be bypassed due to an integer overflow in the Canvas2D component.
- A vulnerability (CVE-2025-11153) that could cause the JIT compiler to incorrectly generate machine code in the JavaScript engine has been fixed.
Source: opennet.ru
