diff --git a/public/manifest.json b/public/manifest.json
index 986e806..65f9dbf 100644
--- a/public/manifest.json
+++ b/public/manifest.json
@@ -2,7 +2,7 @@
   "manifest_version": 2,
   "name": "FreshSearchResult",
   "description": "新鮮な情報の見分けをつけます",
-  "version": "2.0.1",
+  "version": "2.1.0",
   "icons": { "128": "image/icon128.png" },
   "permissions": ["storage"],
   "content_scripts": [
diff --git a/src/main.ts b/src/main.ts
index 1c09096..82e321a 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -3,7 +3,8 @@ import $ from 'jquery';
 let range: JQuery<HTMLElement>;
 
 const main = function() {
-  const baseYear = Number(range.val());
+  const rangeVal = range.val();
+  const baseYear = Number(rangeVal);
   $("#baseYear").text(baseYear);
   const NOW = new Date();
   const OLDEST = new Date(NOW.getFullYear() - Number(range.val()), NOW.getMonth(), NOW.getDate(), NOW.getHours(), NOW.getMinutes(), NOW.getSeconds(), NOW.getMilliseconds());
@@ -13,19 +14,16 @@ const main = function() {
     const span = $(element).find("span.f");
     if (span.length > 0) {
       let date: Date|null = null;
-      if (span[0].innerHTML.substring(0, 10).match(/\d{4}\/\d{2}\/\d{2}/))
-      {
+      if (span[0].innerHTML.substring(0, 10).match(/\d{4}\/\d{2}\/\d{2}/)) {
         date = new Date(span[0].innerHTML.substring(0, 10));
-      } else if (span[0].innerHTML.substring(0, 4).match(/\d* 日前/))
-      {
+      } else if (span[0].innerHTML.substring(0, 4).match(/\d* 日前/)) {
         const found = span[0].innerHTML.substring(0, 4).match(/(?<days>\d*) 日前/);
         const days = Number(found?.groups?.days || "0");
         date = new Date(NOW.getTime());
         date.setDate(NOW.getDate() - days);
       }
 
-      if (date)
-      {
+      if (date) {
         const elapsed = NOW.getTime() - date.getTime();
         const density = 1 - Math.max(Math.min(elapsed / BASE, 1), 0);
         element.style.opacity = (Math.max(density, 0.1)).toString();
@@ -34,18 +32,22 @@ const main = function() {
     }
     element.style.backgroundColor = `rgba(51, 221, 255, 0.2)`;
   });
+
+  chrome.storage.sync.set({"fsr-year": rangeVal});
 }
 
 $(function() {
   $("<span>基準年数：<span id='baseYear'>0</span>年</span>").appendTo("#result-stats");
-  range = $("<input>").attr({
-    type: "range",
-    id: "elapsedBaseYear",
-    min: "1",
-    max: "10",
-    value: "5"
-  }).appendTo("#result-stats");
-  range.on("input", main);
+  const v = chrome.storage.sync.get({"fsr-year": "5"}, function(res) {
+    range = $("<input>").attr({
+      type: "range",
+      id: "elapsedBaseYear",
+      min: "1",
+      max: "10",
+      value: res["fsr-year"]
+    }).appendTo("#result-stats");
+    range.on("input", main);
 
-  main();
+    main();
+  });
 });
\ No newline at end of file