new file mode 100644
--- /dev/null
+++ b/testing/mozharness/configs/l10n_bumper/jamun.py
@@ -0,0 +1,34 @@
+MULTI_REPO = "projects/jamun"
+config = {
+    "log_name": "l10n_bumper",
+
+    "exes": {
+        # Get around the https warnings
+        "hg": ["/usr/local/bin/hg", "--config", "web.cacerts=/etc/pki/tls/certs/ca-bundle.crt"],
+        "hgtool.py": ["/usr/local/bin/hgtool.py"],
+    },
+
+    "gecko_pull_url": "https://hg.mozilla.org/{}".format(MULTI_REPO),
+    "gecko_push_url": "ssh://hg.mozilla.org/{}".format(MULTI_REPO),
+
+    "hg_user": "L10n Bumper Bot <release+l10nbumper@mozilla.com>",
+    "ssh_key": "~/.ssh/ffxbld_rsa",
+    "ssh_user": "ffxbld",
+
+    "vcs_share_base": "/builds/hg-shared",
+    "version_path": "browser/config/version.txt",
+
+    "bump_configs": [{
+        "path": "mobile/locales/l10n-changesets.json",
+        "format": "json",
+        "name": "Fennec l10n changesets",
+        "revision_url": "https://l10n.mozilla.org/shipping/l10n-changesets?av=fennec%(MAJOR_VERSION)s",
+        "platform_configs": [{
+            "platforms": ["android-api-15", "android"],
+            "path": "mobile/android/locales/all-locales"
+        }, {
+            "platforms": ["android-multilocale"],
+            "path": "mobile/android/locales/maemo-locales"
+        }],
+    }],
+}

new file mode 100644
--- /dev/null
+++ b/testing/mozharness/configs/l10n_bumper/mozilla-aurora.py
@@ -0,0 +1,33 @@
+MULTI_REPO = "releases/mozilla-aurora"
+config = {
+    "log_name": "l10n_bumper",
+
+    "exes": {
+        # Get around the https warnings
+        "hg": ["/usr/local/bin/hg", "--config", "web.cacerts=/etc/pki/tls/certs/ca-bundle.crt"],
+        "hgtool.py": ["/usr/local/bin/hgtool.py"],
+    },
+
+    "gecko_pull_url": "https://hg.mozilla.org/{}".format(MULTI_REPO),
+    "gecko_push_url": "ssh://hg.mozilla.org/{}".format(MULTI_REPO),
+
+    "hg_user": "L10n Bumper Bot <release+l10nbumper@mozilla.com>",
+    "ssh_key": "~/.ssh/ffxbld_rsa",
+    "ssh_user": "ffxbld",
+
+    "vcs_share_base": "/builds/hg-shared",
+    "version_path": "browser/config/version.txt",
+
+    "bump_configs": [{
+        "path": "mobile/locales/l10n-changesets.json",
+        "format": "json",
+        "name": "Fennec l10n changesets",
+        "platform_configs": [{
+            "platforms": ["android-api-15", "android"],
+            "path": "mobile/android/locales/all-locales"
+        }, {
+            "platforms": ["android-multilocale"],
+            "path": "mobile/android/locales/maemo-locales"
+        }],
+    }],
+}

--- a/testing/mozharness/configs/l10n_bumper/mozilla-beta.py
+++ b/testing/mozharness/configs/l10n_bumper/mozilla-beta.py
@@ -3,27 +3,32 @@ config = {
     "log_name": "l10n_bumper",
 
     "exes": {
         # Get around the https warnings
         "hg": ["/usr/local/bin/hg", "--config", "web.cacerts=/etc/pki/tls/certs/ca-bundle.crt"],
         "hgtool.py": ["/usr/local/bin/hgtool.py"],
     },
 
-#    "gecko_pull_url": "https://hg.mozilla.org/{}".format(MULTI_REPO),
-#    "gecko_push_url": "ssh://hg.mozilla.org/{}".format(MULTI_REPO),
-    "gecko_pull_url": "https://hg.mozilla.org/projects/jamun",
-    "gecko_push_url": "ssh://hg.mozilla.org/projects/jamun",
+    "gecko_pull_url": "https://hg.mozilla.org/{}".format(MULTI_REPO),
+    "gecko_push_url": "ssh://hg.mozilla.org/{}".format(MULTI_REPO),
 
     "hg_user": "L10n Bumper Bot <release+l10nbumper@mozilla.com>",
     "ssh_key": "~/.ssh/ffxbld_rsa",
     "ssh_user": "ffxbld",
 
     "vcs_share_base": "/builds/hg-shared",
     "version_path": "browser/config/version.txt",
 
     "bump_configs": [{
         "path": "mobile/locales/l10n-changesets.json",
         "format": "json",
         "name": "Fennec l10n changesets",
-        "url": "https://l10n.mozilla.org/shipping/json-changesets?av=fennec%(MAJOR_VERSION)s&platforms=android&multi_android-multilocale_repo={}&multi_android-multilocale_rev=default&multi_android-multilocale_path=mobile/android/locales/maemo-locales".format(MULTI_REPO),
+        "revision_url": "https://l10n.mozilla.org/shipping/l10n-changesets?av=fennec%(MAJOR_VERSION)s",
+        "platform_configs": [{
+            "platforms": ["android-api-15", "android"],
+            "path": "mobile/android/locales/all-locales"
+        }, {
+            "platforms": ["android-multilocale"],
+            "path": "mobile/android/locales/maemo-locales"
+        }],
     }],
 }

new file mode 100644
--- /dev/null
+++ b/testing/mozharness/configs/l10n_bumper/mozilla-central.py
@@ -0,0 +1,33 @@
+MULTI_REPO = "mozilla-central"
+config = {
+    "log_name": "l10n_bumper",
+
+    "exes": {
+        # Get around the https warnings
+        "hg": ["/usr/local/bin/hg", "--config", "web.cacerts=/etc/pki/tls/certs/ca-bundle.crt"],
+        "hgtool.py": ["/usr/local/bin/hgtool.py"],
+    },
+
+    "gecko_pull_url": "https://hg.mozilla.org/{}".format(MULTI_REPO),
+    "gecko_push_url": "ssh://hg.mozilla.org/{}".format(MULTI_REPO),
+
+    "hg_user": "L10n Bumper Bot <release+l10nbumper@mozilla.com>",
+    "ssh_key": "~/.ssh/ffxbld_rsa",
+    "ssh_user": "ffxbld",
+
+    "vcs_share_base": "/builds/hg-shared",
+    "version_path": "browser/config/version.txt",
+
+    "bump_configs": [{
+        "path": "mobile/locales/l10n-changesets.json",
+        "format": "json",
+        "name": "Fennec l10n changesets",
+        "platform_configs": [{
+            "platforms": ["android-api-15", "android"],
+            "path": "mobile/android/locales/all-locales"
+        }, {
+            "platforms": ["android-multilocale"],
+            "path": "mobile/android/locales/maemo-locales"
+        }],
+    }],
+}

--- a/testing/mozharness/scripts/l10n_bumper.py
+++ b/testing/mozharness/scripts/l10n_bumper.py
@@ -24,17 +24,17 @@ try:
     assert json
 except ImportError:
     import json
 
 sys.path.insert(1, os.path.dirname(sys.path[0]))
 
 from mozharness.base.errors import HgErrorList
 from mozharness.base.vcs.vcsbase import VCSScript
-from mozharness.base.log import ERROR
+from mozharness.base.log import ERROR, FATAL
 
 
 class L10nBumper(VCSScript):
     def __init__(self, require_config_file=True):
         super(L10nBumper, self).__init__(
             all_actions=[
                 'clobber',
                 'check-treestatus',
@@ -66,26 +66,27 @@ class L10nBumper(VCSScript):
             os.path.join(
                 abs_dirs['abs_work_dir'],
                 self.config.get('gecko_local_dir', os.path.basename(self.config['gecko_pull_url']))
             ),
         })
         self.abs_dirs = abs_dirs
         return self.abs_dirs
 
-    def hg_commit(self, repo_path, message):
+    def hg_commit(self, path, repo_path, message):
         """
         Commits changes in repo_path, with specified user and commit message
         """
         user = self.config['hg_user']
         hg = self.query_exe('hg', return_type='list')
+        env = self.query_env(partial_env={'LANG': 'en_US.UTF-8'})
+        cmd = hg + ['add', path]
+        self.run_command(cmd, cwd=repo_path, env=env)
         cmd = hg + ['commit', '-u', user, '-m', message]
-        env = self.query_env(partial_env={'LANG': 'en_US.UTF-8'})
         status = self.run_command(cmd, cwd=repo_path, env=env)
-        return status == 0
 
     def hg_push(self, repo_path):
         hg = self.query_exe('hg', return_type='list')
         command = hg + ["push", "-e",
                         "ssh -oIdentityFile=%s -l %s" % (
                             self.config["ssh_key"], self.config["ssh_user"],
                         ),
                         self.config["gecko_push_url"]]
@@ -118,20 +119,62 @@ class L10nBumper(VCSScript):
         return contents.split('.')
 
     def _build_locale_map(self, old_contents, new_contents):
         locale_map = {}
         for key in old_contents:
             if key not in new_contents:
                 locale_map[key] = "removed"
         for k,v in new_contents.items():
-            if old_contents.get(k) != v:
+            if old_contents.get(k, {}).get('revision') != v['revision']:
                 locale_map[k] = v['revision']
+            elif old_contents.get(k, {}).get('platforms') != v['platforms']:
+                locale_map[k] = v['platforms']
         return locale_map
 
+    def _build_platform_dict(self, bump_config):
+        dirs = self.query_abs_dirs()
+        repo_path = dirs['gecko_local_dir']
+        platform_dict = {}
+        for platform_config in bump_config['platform_configs']:
+            path = os.path.join(repo_path, platform_config['path'])
+            self.info("Reading %s for %s locales..." % (path, platform_config['platforms']))
+            contents = self.read_from_file(path)
+            for locale in contents.splitlines():
+                platforms = platform_dict.get(locale, {}).get('platforms', [])
+                platforms = sorted(list(platform_config['platforms']) + platforms)
+                platform_dict[locale] = {'platforms': platforms}
+        self.info("Built platform_dict:\n%s" % pprint.pformat(platform_dict))
+        return platform_dict
+
+    def _build_revision_dict(self, bump_config, version_list):
+        self.info("Building revision dict...")
+        platform_dict = self._build_platform_dict(bump_config)
+        revision_dict = {}
+        if bump_config.get('revision_url'):
+            repl_dict = {
+                'MAJOR_VERSION': version_list[0],
+            }
+
+            url = bump_config['revision_url'] % repl_dict
+            path = self.download_file(url, error_level=FATAL)
+            revision_info = self.read_from_file(path)
+            self.info("Got %s" % revision_info)
+            for line in revision_info.splitlines():
+                locale, revision = line.split(' ')
+                if locale in platform_dict:
+                    revision_dict[locale] = platform_dict[locale]
+                    revision_dict[locale]['revision'] = revision
+        else:
+            for k, v in platform_dict.items():
+                v['revision'] = 'default'
+                revision_dict[k] = v
+        self.info("revision_dict:\n%s" % pprint.pformat(revision_dict))
+        return revision_dict
+
     def build_commit_message(self, name, locale_map):
         revisions = []
         comments = ''
         for locale, revision in sorted(locale_map.items()):
             comments += "%s -> %s\n" % (locale, revision)
         message = 'Bumping %s a=l10n-bump\n\n' % (
             name,
         )
@@ -188,23 +231,18 @@ class L10nBumper(VCSScript):
                                 bump_config['path'])
             # For now, assume format == 'json'.  When we add desktop support,
             # we may need to add flatfile support
             if os.path.exists(path):
                 old_contents = self._read_json(path)
             else:
                 old_contents = {}
 
-            repl_dict = {
-                'MAJOR_VERSION': version_list[0],
-            }
+            new_contents = self._build_revision_dict(bump_config, version_list)
 
-            url = bump_config['url'] % repl_dict
-            new_contents = self.load_json_url(url)
-            self.info("Got %s" % pprint.pformat(new_contents))
             if new_contents == old_contents:
                 continue
             # super basic sanity check
             if not isinstance(new_contents, dict) or len(new_contents) < 5:
                 self.error("Cowardly refusing to land a broken-seeming changesets file!")
                 continue
 
             # Write to disk
@@ -213,17 +251,17 @@ class L10nBumper(VCSScript):
             fh.write(content_string + "\n")
             fh.close()
 
             locale_map = self._build_locale_map(old_contents, new_contents)
 
             # Commit
             message = self.build_commit_message(bump_config['name'],
                                                 locale_map)
-            self.hg_commit(repo_path, message)
+            self.hg_commit(path, repo_path, message)
             changes = True
         return changes
 
     def push(self):
         dirs = self.query_abs_dirs()
         repo_path = dirs['gecko_local_dir']
         return self.hg_push(repo_path)