diff --git a/background/background-worker.js b/background/background-worker.js
new file mode 100644
index 00000000..6403a7ac
--- /dev/null
+++ b/background/background-worker.js
@@ -0,0 +1,12 @@
+importScripts('/js/worker-util.js');
+
+const {loadScript, createAPI} = workerUtil;
+
+createAPI({
+  parseMozFormat(code) {
+
+  },
+  compileUsercss(style, allowErrors = false) {
+
+  }
+});
diff --git a/background/background.js b/background/background.js
index 80f3f13a..20033b52 100644
--- a/background/background.js
+++ b/background/background.js
@@ -8,6 +8,8 @@ global usercss
 */
 'use strict';
 
+var backgroundWorker = workerUtil.createWorker('/background/background-worker.js');
+
 window.API_METHODS = Object.assign(window.API_METHODS || {}, {
 
   getStyles,