Index: build.py
===================================================================
--- a/build.py
+++ b/build.py
@@ -228,6 +228,8 @@
 def createDevEnv(baseDir, scriptName, opts, args, type):
     if type == 'safari':
         import buildtools.packagerSafari as packager
+    elif type == 'edge':
+        import buildtools.packagerEdge as packager
     else:
         import buildtools.packagerChrome as packager
 
@@ -479,7 +481,7 @@
 with addCommand(createDevEnv, 'devenv') as command:
     command.shortDescription = 'Set up a development environment'
     command.description = 'Will set up or update the devenv folder as an unpacked extension folder for development.'
-    command.supportedTypes = ('gecko-webext', 'chrome', 'safari')
+    command.supportedTypes = ('gecko-webext', 'chrome', 'safari', 'edge')
 
 with addCommand(setupTranslations, 'setuptrans') as command:
     command.shortDescription = 'Sets up translation languages'