Network.proxy.autoconfig url

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When using a single proxy for all HTTP traffic is not flexible enough, or if you need to centrally administer proxy settings for a network or organization, PAC (Proxy AutoConfiguration) files allow you to choose a proxy via script.

This preference points to a PAC file to be used by Mozilla when network.proxy.type is set to 2.

Possible values and their effects

A URL (remote or local) to a valid PAC file. Default is an empty string.



Mozilla Firefox 1.5

The field “Automatic proxy configuration URL” under “Tools → Options → General → Connection → Connection Settings...”


The field “Automatic proxy configuration URL” under “Edit → Preferences → Advanced → Proxies”

Previous effects

Although this preference worked in Netscape Communicator, it did nothing in Mozilla until PAC functionality was implemented (see check-in date below).

First checked in

2001-04-16 by George Drapeau

Has an effect in

  • Mozila Suite (all versions since 0.9)
  • Netscape (all versions since 6.1 PR1)
  • Mozilla Firefox (all versions)
  • SeaMonkey (all versions)

Related bugs

Related preferences

External links