Usage: install-xpi [options] <xpi-file> install-xpi: error: no such option: --version

Usage: install-xpi [options] <xpi-file> Options: -h, --help show this help message and exit --disable-system-prefs do not create a system preference file in /etc -x FILE, --exclude=FILE do not install specified FILE -i DIRECTORY, --install-dir=DIRECTORY install extension into the specified DIRECTORY -l DIRECTORY, --link=DIRECTORY link from DIRECTORY to extension directory -p PACKAGE, --package=PACKAGE install the extension into specified PACKAGE --preserve-permissions do not adjust the file permissions -r, --remove-license-files do not install license files -v, --verbose print more information See install-xpi(1) for more info.