Firefox provides settings and configuration windows in a user friendly way. But as a browser it provides a lot of configuration and all of these configurations can not be put in to forms. We can access this detialed configuration through browser address bar.

Open All Configs

We can open about config by putting about:config  into address bar. This will show us a warning about the sensitivity of the configuration page we want to open.

After clicking the button I accept the risk we will see following screen which will list all configuration.

Search and Filter About Config

As we see there are a lot of configuration parameters. Finding a configuration from this list by searching with eye is very hard. We can use Search box in the start of the page. In this example we will search for mp4 configuration or term.

Add New Preference

We can add new configuration line simply clicking one of the configuration with right mouse button and selecting one of the type from New menu

• String is used for text values
• Integer is used for numeric values
• Boolean is used logic True and False values

As an example we have selected String . First we put the value name which is Test in this case.

Than we put the value of the Test configuration which is This is test

Preference Status

Most of the preferences  comes by default but we can change them. As we see in previous example we can also add new preference. Preference Status ‘s are

• user set is defined or changed by user
• default is provided by browser.