From MozillaZine Knowledge Base
Firefox 3 allows web pages to register themselves as protocol handlers. This allows, for example, all links starting with
A set of preferences exists to “seed” the list of registered content handlers. Information from these preferences is copied into mimeTypes.rdf every time the browser sees a new version of content handlers. This preference keeps track of the version.
Possible values and their effects
A string corresponding to the current version of default content handlers. If this value differs from the value embedded in mimeTypes.rdf, content handlers from the enumerated preferences gecko.handlerService.schemes.(protocol).*.name and gecko.handlerService.schemes.(protocol).*.uriTemplate are copied into that file. Default value is 0.
First checked in
Has an effect in