How do I configure Mozilla Firefox to use a PAC file?


How do I configure Mozilla Firefox to use a PAC file?

To redirect your web traffic to the Zscaler cloud, configure your browser to use a Proxy Auto-Configuration (PAC) file. A PAC file is a text file that directs a browser to forward traffic to a proxy server before going to the destination server. The Zscaler service hosts a default PAC file that uses Geo-location technology to forward traffic to the nearest Zscaler Enforcement Node (ZEN).

To learn more, see How do I use default PAC files to forward traffic to the Zscaler service?

The following steps describe how to configure Mozilla Firefox to use a PAC file. The browser version used in this example is Mozilla Firefox 49.0.1.

To view the default PAC file, log in to the service portal and follow the instructions below.

If you were provided a PAC file URL, skip the first two steps.

  1. Go to Administration > Resources > Hosted PAC Files.
  2. Copy the URL of the default PAC file for the Web.
    See Image.
  3. Open Firefox and open the menu. Then click Options.
    See image.
  4. In the Options tab, click Advanced, then click Network. In the Network tab, click Settings....
    See image. 
  5. In the Connection Settings window, select Automatic proxy configuration URL and paste the PAC file URL that you copied from the Zscaler service portal.
    See image. 
  6. Click OK to save the configuration.

For more information about getting started on the Zscaler service, see the Zscaler Quick Start Guide.

Screenshot of Hosted PAC Files page highlighting the URL of the default PAC file

 Screenshot of Firefox settings highlighting the Options icon

 Screenshot of Network page under the Advanced settings tab. Settings button highlighted

 Screenshot of Connections Settings window on Firefox highlighting Automatic proxy configuration URL button. PAC URL is entered in the field.