Allow building Firefox developer edition

Resolves #536.

Author: victor-catalyst

NodeFirefox/Dockerfile.txt

@@ -4,7 +4,7 @@ USER root
 # Firefox
 #=========
 ARG FIREFOX_VERSION=58.0.2
-RUN FIREFOX_DOWNLOAD_URL=$(if [ $FIREFOX_VERSION = "nightly" ]; then echo "https://download.mozilla.org/?product=firefox-nightly-latest-ssl&os=linux64&lang=en-US"; else echo "https://download-installer.cdn.mozilla.net/pub/firefox/releases/$FIREFOX_VERSION/linux-x86_64/en-US/firefox-$FIREFOX_VERSION.tar.bz2"; fi) \
+RUN FIREFOX_DOWNLOAD_URL=$(if [ $FIREFOX_VERSION = "nightly" ] || [ $FIREFOX_VERSION = "devedition" ]; then echo "https://download.mozilla.org/?product=firefox-$FIREFOX_VERSION-latest-ssl&os=linux64&lang=en-US"; else echo "https://download-installer.cdn.mozilla.net/pub/firefox/releases/$FIREFOX_VERSION/linux-x86_64/en-US/firefox-$FIREFOX_VERSION.tar.bz2"; fi) \
   && apt-get update -qqy \
   && apt-get -qqy --no-install-recommends install firefox \
   && rm -rf /var/lib/apt/lists/* /var/cache/apt/* \