Most firewalls have adopted the following three ways of working in one or more of: using a filter to check the data source and destination, according to the provisions of the administrator accept or reject the data packet; scan data packets, look for and application of relevant data; in the network layer packet mode checks to see whether the known "friendly" packet bit mode. Firewall is the first line of defense system, is used to prevent the illegal entry of data, the role is to prevent illegal users. There are several ways to identify the legitimacy of a user, the password is the most common, but there are many users with a very easy to guess the word or phrase as your password, making the methods often fail. Other methods include the identification of physiological characteristics of the human body, knowledge cards and Toden.
New JavaScript engine called TraceMonkey, for Windows, Mac and Linux computers, but the environment is not turned on by default. To start the engine in the Smart Bar to enter about: config, and then filter the type javascript.options.jit.content. Double-click the personal preferences of the projects can not change the boolean setting from Yes. Close the window, you should be able to immediately detect the speed of JavaScript to improve the show. However, without guarantee. SunSpider JavaScript benchmarks based on the results, Firefox 3.1 beta 1 in 2787.6 milliseconds to complete the test - about the current Firefox 3.0.3 than twice as fast. Firefox 3.0.3 is the most stable version, clock speed is 5446.6 ms.