For beta and release builds which have not yet been released, you need the right update channel:
firefox-ui-update --installer "Firefox Setup 38.0b6.exe" --update-channel=beta-localtest
= How to use a newer version of firefox-ui-tests =
Run these commands:
git clone https://github.com/mozilla/firefox-ui-tests.git
cd firefox-ui-tests
python setup.py sdist
wget https://hg.mozilla.org/build/braindump/raw-file/default/utils/publish_package_our_pypi.sh
chmod +x publish_package_our_pypi.sh
# Connect to the VPN
./publish_package_our_pypi.sh dist/firefox-ui-tests-*.tar.gz
= Failure modes =