--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -2367,25 +2367,25 @@ ContentParent::InitInternal(ProcessPrior
       SerializeURI(sheet->GetSheetURI(), uri);
       Unused << SendLoadAndRegisterSheet(uri, nsIStyleSheetService::AUTHOR_SHEET);
     }
   }
 
 #ifdef MOZ_CONTENT_SANDBOX
   bool shouldSandbox = true;
   MaybeFileDesc brokerFd = void_t();
-#ifdef XP_LINUX
   // XXX: Checking the pref here makes it possible to enable/disable sandboxing
   // during an active session. Currently the pref is only used for testing
   // purpose. If the decision is made to permanently rely on the pref, this
   // should be changed so that it is required to restart firefox for the change
   // of value to take effect.
   shouldSandbox = (GetEffectiveContentSandboxLevel() > 0) &&
     !PR_GetEnv("MOZ_DISABLE_CONTENT_SANDBOX");
 
+#ifdef XP_LINUX
   if (shouldSandbox) {
     MOZ_ASSERT(!mSandboxBroker);
     UniquePtr<SandboxBroker::Policy> policy =
       sSandboxBrokerPolicyFactory->GetContentPolicy(Pid());
     if (policy) {
       brokerFd = FileDescriptor();
       mSandboxBroker = SandboxBroker::Create(Move(policy), Pid(), brokerFd);
       if (!mSandboxBroker) {

--- a/testing/xpcshell/runxpcshelltests.py
+++ b/testing/xpcshell/runxpcshelltests.py
@@ -919,16 +919,21 @@ class XPCShellTests(object):
         # Don't permit remote connections by default.
         # MOZ_DISABLE_NONLOCAL_CONNECTIONS can be set to "0" to temporarily
         # enable non-local connections for the purposes of local testing.
         # Don't override the user's choice here.  See bug 1049688.
         self.env.setdefault('MOZ_DISABLE_NONLOCAL_CONNECTIONS', '1')
         if self.mozInfo.get("topsrcdir") is not None:
             self.env["MOZ_DEVELOPER_REPO_DIR"] = self.mozInfo["topsrcdir"].encode()
 
+        # Disable the content process sandbox for the xpcshell tests. They
+        # currently attempt to do things like bind() sockets, which is not
+        # compatible with the sandbox.
+        self.env["MOZ_DISABLE_CONTENT_SANDBOX"] = "1"
+
     def buildEnvironment(self):
         """
           Create and returns a dictionary of self.env to include all the appropriate env variables and values.
           On a remote system, we overload this to set different values and are missing things like os.environ and PATH.
         """
         self.env = dict(os.environ)
         self.buildCoreEnvironment()
         if sys.platform == 'win32':