daily -> nightly (they are the same)

emsdk.py

diff --git a/emsdk.py b/emsdk.py
index bebded3..4104bb0 100644
--- a/emsdk.py
+++ b/emsdk.py
@@ -1278,20 +1278,20 @@
     # on Firefox servers for the particular version. So prepare to handle both further down below.
     extension = 'tar.xz'
 
-  if tool.version == 'daily':
-    scraper = FactoryScraper('daily', extension=extension)
+  if tool.version == 'nightly':
+    scraper = FactoryScraper('nightly', extension=extension)
   else:
     scraper = FactoryScraper('release', version=tool.version, extension=extension, locale='en-US')
   print(scraper.url)
   print(scraper.filename)
 
-  if tool.version == 'daily':
+  if tool.version == 'nightly':
     firefox_version = os.path.basename(scraper.filename).split(".en-US")[0]
   else:
     firefox_version = os.path.basename(scraper.filename).split("firefox-")[1].split(".en-US")[0]
 
   print('Target Firefox version: ' + firefox_version)
-  if tool.version in ['latest', 'daily']:
+  if tool.version in ['latest', 'nightly']:
     pretend_version_dir = os.path.normpath(tool.installation_path())
     orig_version = tool.version
     tool.version = firefox_version
@@ -1328,8 +1328,8 @@
       tar.extractall(path=root)
     collapse_subdir = os.path.join(root, 'firefox')
   elif filename.endswith('.dmg'):
-    mount_point = '/Volumes/Firefox Nightly' if tool.version == 'daily' else '/Volumes/Firefox' 
-    app_name = 'Firefox.app' if tool.version == 'daily' else 'Firefox Nightly.app'
+    mount_point = '/Volumes/Firefox Nightly' if tool.version == 'nightly' else '/Volumes/Firefox'
+    app_name = 'Firefox.app' if tool.version == 'nightly' else 'Firefox Nightly.app'
     # If a previous mount point exists, detach it first
     if os.path.exists(mount_point):
       run(['hdiutil', 'detach', mount_point])

emsdk_manifest.json

diff --git a/emsdk_manifest.json b/emsdk_manifest.json
index bce4589..0f46f53 100644
--- a/emsdk_manifest.json
+++ b/emsdk_manifest.json
@@ -521,7 +521,7 @@
   },
   {
     "id": "firefox",
-    "version": "daily",
+    "version": "nightly",
     "bitness": 64,
     "url": "downloaded via mozdownload script, but a dummy directive is placed here so emsdk understands this Tool to be downloaded from the web",
     "git_branch": "dummy field, to instruct emsdk to attempt to reinstall this tool even if it is installed, to check for new version",