The open source Mozilla Foundation has updated its Firefox browser to close two security vulnerabilities which came to light last weekend.
Mozilla says all Firefox users should update their browsers from version 1.0.3 to version 1.0.4 to protect themselves from the threats.
Version 1.0.3 was only released in mid-April, and Mozilla has now had to update Firefox a number of times in quick succession to counter major threats since its launch last November.
So far this year, there have been more major security threats to Firefox than Microsoft’s Internet Explorer.
The threats tackled by Firefox version 1.0.4 relate to cross-site scripting and hacker remote access.
Security researcher Secunia reported the “proof of concept” flaws and said they were “extremely critical” as exploited code had been circulated on the internet.
In releasing a patch in less than a week however, it has acted quicker than Microsoft has done in the past when Internet Explorer has faced major threats.
Firefox has been downloaded over 50 million times by users.