How does Firefox change agents?

How does Firefox change agents? Now, many people are using the Firefox browser, the open source Web browser. A lot of people are asking, how does Firefox browser modify the agent? Firefox as well as IE can also modify the proxy access, the following specific talk about how to set.

Method/Step

Open Firefox and click on the "Open menu" button in the upper-right corner of the interface

Firefox browser agent

In the Drop-down box that pops up, click the "Options" button in the middle.

Firefox browser agent

Then in the Options dialog, click on the "Advanced" button at the top right.

Click on the "Configure Firefox how to connect to the Internet" setting button on the right

Firefox browser agent

Choose to manually configure the agent and enter the available proxy IP address and port. Like. mozilla.org,.net.nz,192.168.1.0:24