A corrective release of Firefox 143.0.3 is now available, addressing several issues:
- The timing for tab pinning has been adjusted to behave like a permanently visible shortcut after dragging the tab to the beginning of the tab bar. The drag-and-drop behavior for pinning is now closer to that of tab group dragging.
- The issue preventing some extensions from being updated via the Add-ons Manager has been resolved.
- A regression that caused the collapsing and expanding of sections on the Firefox View page to stop functioning has been fixed.
- A bug in the storage implementation for WebExtensions that caused crashes during startup when installing certain extensions, such as Notefox, has been fixed.
- An issue that disrupted the functioning of the content settings interface (Application Menu [≡] > More Tools > Customize Toolbar) and some keyboard shortcuts after opening the extension settings page has been resolved.
- Long delays (~5 seconds) when loading certain websites while operating from networks blocking UDP packets have been eliminated.
- A vulnerability (CVE-2025-11152) that allowed sandbox isolation to be bypassed due to an integer overflow in the Canvas2D component has been fixed.
- A vulnerability (CVE-2025-11153) that led to incorrect machine code generation by the JIT compiler in the JavaScript engine has been resolved.
Source: opennet.ru
