An updated version of Firefox3 has just been updated by Mozilla that targets 12 security issues of which four have been rated as quite critical.

A security advisory appeared Tuesday tells that it was the third update during this year and the vulnerabilities that have been fixed in it two of them relates to browser engine and two are of JavaScirpt engine.

Developers at Mozilla have succeeded to identify and fix various vulnerabilities in Firefox browser engine and other products from Mozilla.  Memory corruption evidences have been noticed in some crashes in some conditions.

The release has come as Mozilla is making preparation to launch Firefox 3.5 fourth beta that will be the next version of this open source browser. The new Shiretoko version of Firefox was due earlier this year, but now the organization says that they are considering a fourth beta of it.

Quick execution of JavaScript programs, new mode for private browsing, support for JavaScript Object Notation technology to exchange data in browsers and servers and different multimedia technologies are some changes that are being expected in Firefox 3.5.

According to Secunia, a security testing company, Mozilla seems to have a lot more vulnerabilities in its browser than can be seen IE, Opera and Safari as combined. But at the same time, Mozilla has been dealing with these flaws a lot quicker than other parties.

However, Mozilla’s web browser has been chipping away the market dominance of IE. Currently, it has 22.05% of market share while Internet Explorer has 66.82% share that is nearly 7% down from previous year. The users of Firefox3 will be notified within 48hrs and if they don’t, the update can be downloaded manually through Check for Updates.

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