Firefox is set to get a significant performance boost to its JavaScript engine, marrying the TraceMonkey native-code compiler to a faster JIT compiler.

Security researchers have identified a Trojan which attacks a flaw in Adobe Reader's JavaScript handling to insert a backdoor - and a patch isn't due until tomorrow.

Adobe has released the source code for two of its Flash-based frameworks - the Open Source Media Framework and the Text Layer Framework - via the Mozilla Public Licence.

A flaw in the just-in-time compiler introduced in Firefox 3.5's new JavaScript engine can lead to code execution, with Mozilla calling the un-patched hole "critical."

The latest stable release of Google's open-source Chrome browser features a tweaked JavaScript engine that boosts performance by up to 30 percent.

Adobe's popular Reader PDF viewer package is currently under attack by a zero-day vulnerability in its JavaScript implementation - again.

Google has launched a site to host advanced JavaScript applications which showcase Chrome's engine - along with early support for extensions in its browser.