--- a/testing/marionette/harness/marionette/runner/base.py
+++ b/testing/marionette/harness/marionette/runner/base.py
@@ -548,17 +548,16 @@ class BaseMarionetteTestRunner(object):
         self.tree = tree
         self.type = type
         self.device_serial = device_serial
         self.symbols_path = symbols_path
         self.timeout = timeout
         self.socket_timeout = socket_timeout
         self._device = None
         self._capabilities = None
-        self._appinfo = None
         self._appName = None
         self.shuffle = shuffle
         self.shuffle_seed = shuffle_seed
         self.sdcard = sdcard
         self.sources = sources
         self.server_root = server_root
         self.this_chunk = this_chunk
         self.total_chunks = total_chunks
@@ -645,33 +644,16 @@ class BaseMarionetteTestRunner(object):
             return self._capabilities
 
         self.marionette.start_session()
         self._capabilities = self.marionette.session_capabilities
         self.marionette.delete_session()
         return self._capabilities
 
     @property
-    def appinfo(self):
-        if self._appinfo:
-            return self._appinfo
-
-        self.marionette.start_session()
-        with self.marionette.using_context('chrome'):
-            self._appinfo = self.marionette.execute_script("""
-            try {
-              return Services.appinfo;
-            } catch (e) {
-              return null;
-            }""")
-        self.marionette.delete_session()
-        self._appinfo = self._appinfo or {}
-        return self._appinfo
-
-    @property
     def device(self):
         if self._device:
             return self._device
 
         self._device = self.capabilities.get('device')
         return self._device
 
     @property
@@ -995,23 +977,21 @@ setReq.onerror = function() {
 
         if file_ext == '.ini':
             manifest = TestManifest()
             manifest.read(filepath)
 
             filters = []
             if self.test_tags:
                 filters.append(tags(self.test_tags))
-            e10s = self.appinfo.get('browserTabsRemoteAutostart', False)
             manifest_tests = manifest.active_tests(exists=False,
                                                    disabled=True,
                                                    filters=filters,
                                                    device=self.device,
                                                    app=self.appName,
-                                                   e10s=e10s,
                                                    **mozinfo.info)
             if len(manifest_tests) == 0:
                 self.logger.error("no tests to run using specified "
                                   "combination of filters: {}".format(
                                        manifest.fmt_filters()))
 
             unfiltered_tests = []
             for test in manifest_tests: