Network.protocol-handler.app.(protocol)

From MozillaZine Knowledge Base

The title given to this article is incorrect due to technical limitations. The correct title is network.protocol-handler.app.(protocol).

This article describes the preference network.protocol-handler.app.(protocol). To add, delete, or modify this preference, you will need to edit your configuration — do not edit this article.

1 Background
2 Possible values and their effects
3 Caveats
4 First checked in
5 Has an effect in
6 See also
7 Related bugs
8 Related preferences

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Background

Protocols (ex: http, ftp, mailto) are different methods of sending information over the Internet. Protocols may be handled by Mozilla applications themselves, or they may be passed to external applications, or they may not be handled at all. On Linux and Mac systems, this preference determines what external program should handle the request.

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Possible values and their effects

A path to a program to handle the request.

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Caveats

This preference has no effect on Windows, as the application to run is determined by the OS. See this article for details.
network.protocol-handler.expose-all or network.protocol-handler.expose.(protocol) (which tell the application that this protocol should be handled in some way) and network.protocol-handler.external.(protocol) (which tells the application that this protocol should be handled externally) must be set to true for this preference to take effect.
This preference only exists by default for certain protocols.
If the path doesn't refer to an executable program, the application will inform you "Protocol (protocol) isn't associated with any program"

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