complete histoly simply

src/background/histories.js

@@ -0,0 +1,10 @@
+const getCompletions = (keyword) => {
+  return browser.history.search({
+    text: keyword,
+    startTime: '1970-01-01'
+  }).then((items) => {
+    return items.sort((x, y) => x.lastVisitTime < y.lastVisitTime).slice(0, 10);
+  });
+};
+
+export { getCompletions };