Changing selenium's default tmp directory

Whenever Selenium fires up Firefox (we are still running Selenium in RC mode) a new Firefox profile directory will be create at every startup. Usually this directory will be created in /tmp - which is for various reasons not always the desired location.

Selenium RC itself has no configuration option to change this location as it relies on the default value provided by java. Fortunately java provides a command line option -Djava.io.tmpdir allowing to specify a new tmp directory.

So change your startup call of Selenium RC to

java -Djava.io.tmpdir=/your/tmp/dir -jar selenium-server.jar

and you're all set.

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