From time-to-time, it may become necessary to have several Firefox windows open at the same time. There are several ways to open a new browser window:

First, you can type Ctrl+N on your keyboard.

Second, at the top of your Firefox browser, click File > New Window:

 

 

Finally, you can click on the “New Window” button in your Firefox browser. This button does not appear in your browser window by default. You have to do some simple customizing.

To add the “New Window” button, click on View > Toolbars > Customize:

 

 

The “Customize Toolbar” window will appear. Find the “New Window” button:

 

 

Left-click on the “New Window” button and drag it to one of your toolbars. The black vertical line indicates where the new button will be placed.

 

 

Your toolbar should look like the following:

 

 

So there you have it — three different ways to open a new Firefox window: