--- a/mozilla/l10n-changesets_mobile-beta.json
+++ b/mozilla/l10n-changesets_mobile-beta.json
@@ -319,16 +319,16 @@
     "revision": "14718c152e44",
     "platforms": ["android"]
   },
   "xh": {
     "revision": "f587b401f8fc",
     "platforms": ["android", "android-multilocale"]
   },
   "zh-CN": {
-    "revision": "f27c5fc05ffc",
+    "revision": "d260be15e967",
     "platforms": ["android", "android-multilocale"]
   },
   "zh-TW": {
     "revision": "267404478cf9",
     "platforms": ["android", "android-multilocale"]
   }
 }

--- a/mozilla/release-fennec-mozilla-beta.py
+++ b/mozilla/release-fennec-mozilla-beta.py
@@ -15,31 +15,31 @@ releaseConfig['messagePrefix']       = '
 
 # Basic product configuration
 #  Names for the product/files
 releaseConfig['productName']         = 'fennec'
 releaseConfig['stage_product']       = 'mobile'
 releaseConfig['appName']             = 'mobile'
 releaseConfig['relbranchPrefix']     = 'MOBILE'
 #  Current version info
-releaseConfig['version']             = '51.0b4'
+releaseConfig['version']             = '51.0b5'
 releaseConfig['appVersion']          = '51.0'
 releaseConfig['milestone']           = releaseConfig['appVersion']
 releaseConfig['buildNumber']         = 1
-releaseConfig['baseTag']             = 'FENNEC_51_0b4'
+releaseConfig['baseTag']             = 'FENNEC_51_0b5'
 #  Next (nightly) version info
 releaseConfig['nextAppVersion']      = releaseConfig['appVersion']
 releaseConfig['nextVersion']         = releaseConfig['version']
 releaseConfig['nextMilestone']       = releaseConfig['milestone']
 #  Repository configuration, for tagging
 releaseConfig['sourceRepositories']  = {
     'mobile': {
         'name': 'mozilla-beta',
         'path': 'releases/mozilla-beta',
-        'revision': '1b954c82dd04',
+        'revision': '9afe68360fa8',
         'relbranch': None,
         'bumpFiles': {
             'browser/config/version_display.txt': {
                 'version': releaseConfig['version'],
                 'nextVersion': lambda x: x
             },
             'browser/config/version.txt': {
                 'version': releaseConfig['appVersion'],