diff --git a/docs/en/updates/changelog.md b/docs/en/updates/changelog.md
index f7d4ae5..5fe314d 100644
--- a/docs/en/updates/changelog.md
+++ b/docs/en/updates/changelog.md
@@ -1,5 +1,12 @@
 # Update Log
 
+## v5.0.1
+
+- Fixed bug where courses were not auto-tracked on first install/update
+- Auto-track newly added courses, auto-remove courses no longer in the list
+- Fixed incorrect current week highlight on past semester courses
+- Extension icon click now opens docs page based on user language setting
+
 ## v5.0.0
 
 - Multi-language support (Korean/English/Japanese/Chinese)
diff --git a/docs/ja/updates/changelog.md b/docs/ja/updates/changelog.md
index 133dfbd..562b5db 100644
--- a/docs/ja/updates/changelog.md
+++ b/docs/ja/updates/changelog.md
@@ -1,5 +1,12 @@
 # アップデートログ
 
+## v5.0.1
+
+- 初回インストール/アップデート時に科目が自動トラッキングされないバグを修正
+- 新しく追加された科目の自動トラッキング、削除された科目の自動除去
+- 過去学期の講義で現在の週として誤って表示されるバグを修正
+- 拡張機能アイコンクリック時にユーザー言語設定に基づくドキュメントページへ移動
+
 ## v5.0.0
 
 - 多言語対応（韓国語/英語/日本語/中国語）
diff --git a/docs/updates/changelog.md b/docs/updates/changelog.md
index 78c53a5..592a519 100644
--- a/docs/updates/changelog.md
+++ b/docs/updates/changelog.md
@@ -1,5 +1,12 @@
 # 업데이트 로그
 
+## v5.0.1
+
+- 첫 설치/업데이트 시 과목 자동 트래킹이 안 되던 버그 수정
+- 새로 추가된 과목 자동 트래킹, 사라진 과목 자동 제거
+- 이전 학기 강의에서 현재 주차로 잘못 표시되는 버그 수정
+- 확장 프로그램 아이콘 클릭 시 사용자 언어 설정 기반 문서 페이지 이동
+
 ## v5.0.0
 
 - 다국어 지원 (한국어/영어/일본어/중국어)
diff --git a/docs/zh/updates/changelog.md b/docs/zh/updates/changelog.md
index 4237d8d..7b55311 100644
--- a/docs/zh/updates/changelog.md
+++ b/docs/zh/updates/changelog.md
@@ -1,5 +1,12 @@
 # 更新日志
 
+## v5.0.1
+
+- 修复首次安装/更新时科目未自动跟踪的问题
+- 自动跟踪新增科目，自动移除已不存在的科目
+- 修复过去学期课程错误显示为当前周次的问题
+- 点击扩展图标时根据用户语言设置跳转到对应文档页面
+
 ## v5.0.0
 
 - 多语言支持（韩语/英语/日语/中文）
diff --git a/src/background.ts b/src/background.ts
index f2a7192..8e02ea5 100644
--- a/src/background.ts
+++ b/src/background.ts
@@ -25,5 +25,11 @@ chrome.runtime.onInstalled.addListener((details) => {
 });
 
 chrome.action.onClicked.addListener(() => {
-  chrome.runtime.openOptionsPage();
+  const BASE_URL = 'https://hs-shell.github.io/dotbugi/';
+  const LANG_PATHS: Record<string, string> = { en: 'en/', ja: 'ja/', zh: 'zh/' };
+
+  chrome.storage.local.get('language', (result) => {
+    const langPath = LANG_PATHS[result.language] ?? '';
+    chrome.tabs.create({ url: BASE_URL + langPath });
+  });
 });
diff --git a/src/hooks/useGetCourses.ts b/src/hooks/useGetCourses.ts
index 695280a..fec2477 100644
--- a/src/hooks/useGetCourses.ts
+++ b/src/hooks/useGetCourses.ts
@@ -30,17 +30,39 @@ export const useGetCourses = () => {
       saveDataToStorage('courses', JSON.stringify(courses));
 
       loadDataFromStorage<string[]>('trackedCourseIds', (savedIds) => {
-        if (savedIds) {
-          // 빈 배열([])도 유효한 저장 상태로 취급 (사용자가 의도적으로 모두 해제한 경우)
-          setTrackedCourseIdsState(savedIds);
-        } else {
-          // 최초 사용: 비교과(커뮤니티)와 이전 학기 과목 제외하고 전부 트래킹
-          const defaultIds = courses
-            .filter((c) => !c.isCommunity && c.isCurrentSemester !== false)
-            .map((c) => c.courseId);
-          setTrackedCourseIdsState(defaultIds);
-          saveDataToStorage('trackedCourseIds', defaultIds);
-        }
+        if (!savedIds && courses.length === 0) return;
+
+        loadDataFromStorage<string[]>('knownCourseIds', (knownIds) => {
+          const knownSet = new Set(knownIds ?? []);
+
+          if (savedIds) {
+            const currentCourseIds = new Set(courses.map((c) => c.courseId));
+            // 현재 강의 목록에 없는 과목은 추적에서 제거
+            const filtered = savedIds.filter((id) => currentCourseIds.has(id));
+            // 새로 추가된 과목 자동 추가
+            const newTrackableIds = courses
+              .filter((c) => !knownSet.has(c.courseId) && !c.isCommunity)
+              .map((c) => c.courseId);
+            const mergedIds = [...filtered, ...newTrackableIds];
+            setTrackedCourseIdsState(mergedIds);
+            if (filtered.length !== savedIds.length || newTrackableIds.length > 0) {
+              saveDataToStorage('trackedCourseIds', mergedIds);
+            }
+          } else if (courses.length > 0) {
+            // 최초 사용: 비교과(커뮤니티)와 이전 학기 과목 제외하고 전부 트래킹
+            const defaultIds = courses
+              .filter((c) => !c.isCommunity)
+              .map((c) => c.courseId);
+            setTrackedCourseIdsState(defaultIds);
+            saveDataToStorage('trackedCourseIds', defaultIds);
+          }
+
+          // 현재 과목 목록을 knownCourseIds로 저장
+          if (courses.length > 0) {
+            const updatedKnown = [...new Set([...knownSet, ...courses.map((c) => c.courseId)])];
+            saveDataToStorage('knownCourseIds', updatedKnown);
+          }
+        });
       });
     };
 
diff --git a/src/lib/courseStatus/currentWeek.ts b/src/lib/courseStatus/currentWeek.ts
index 2129039..095c73b 100644
--- a/src/lib/courseStatus/currentWeek.ts
+++ b/src/lib/courseStatus/currentWeek.ts
@@ -63,6 +63,9 @@ function parseSectionDateRange(text: string, year: number): { start: Date; end:
 // ── Highlight & scroll button ───────────────────────────────────────
 
 export function highlightCurrentWeek() {
+  // .course_box_current는 현재 학기 강의에서만 존재
+  if (!document.querySelector('.course_box_current')) return;
+
   const now = new Date();
   const sections = document.querySelectorAll('li[id^="section-"]');
   const fallbackYear = inferYear(sections);
diff --git a/src/lib/injectCourseToggles.ts b/src/lib/injectCourseToggles.ts
index a093c3b..ae19239 100644
--- a/src/lib/injectCourseToggles.ts
+++ b/src/lib/injectCourseToggles.ts
@@ -12,14 +12,37 @@ export function injectCourseToggles() {
   saveDataToStorage('communityIds', communityIds);
 
   loadDataFromStorage<string[]>('trackedCourseIds', (savedIds) => {
-    const trackedIds = savedIds ?? allCourses
-      .filter((c) => !c.isCommunity && c.isCurrentSemester !== false)
-      .map((c) => c.courseId);
+    loadDataFromStorage<string[]>('knownCourseIds', (knownIds) => {
+    const knownSet = new Set(knownIds ?? []);
+
+    const currentCourseIds = new Set(allCourses.map((c) => c.courseId));
+
+    let trackedIds: string[];
+    let changed = false;
+    if (savedIds) {
+      // 현재 강의 목록에 없는 과목은 추적에서 제거
+      const filtered = savedIds.filter((id) => currentCourseIds.has(id));
+      // 새로 추가된 과목 자동 추가
+      const newTrackableIds = allCourses
+        .filter((c) => !knownSet.has(c.courseId) && !c.isCommunity)
+        .map((c) => c.courseId);
+      trackedIds = [...filtered, ...newTrackableIds];
+      changed = filtered.length !== savedIds.length || newTrackableIds.length > 0;
+    } else {
+      trackedIds = allCourses
+        .filter((c) => !c.isCommunity)
+        .map((c) => c.courseId);
+      changed = true;
+    }
 
-    if (!savedIds) {
+    if (changed) {
       saveDataToStorage('trackedCourseIds', trackedIds);
     }
 
+    // knownCourseIds 업데이트
+    const updatedKnown = [...new Set([...knownSet, ...currentCourseIds])];
+    saveDataToStorage('knownCourseIds', updatedKnown);
+
     const trackedSet = new Set(trackedIds);
     const listItems = document.querySelectorAll('.my-course-lists > li');
 
@@ -48,6 +71,7 @@ export function injectCourseToggles() {
         courseBox.appendChild(toggle);
       }
     });
+    });
   });
 }
 
diff --git a/src/lib/parseCourses.ts b/src/lib/parseCourses.ts
index badf2cd..8f2ced0 100644
--- a/src/lib/parseCourses.ts
+++ b/src/lib/parseCourses.ts
@@ -17,8 +17,7 @@ function parseCourseFromElement(li: Element): CourseBase | null {
   if (!courseId || !courseTitle || !prof) return null;
 
   const isCommunity = li.classList.contains(COMMUNITY_CLASS);
-  const isCurrentSemester = isCommunity || !!li.querySelector('.course_box_current');
-  return { courseId, courseTitle, prof, isCommunity, isCurrentSemester };
+  return { courseId, courseTitle, prof, isCommunity };
 }
 
 export function parseCoursesFromDOM(): CourseBase[] {
diff --git a/src/types.ts b/src/types.ts
index 0158fa6..ab6dd7a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -3,7 +3,6 @@ export type CourseBase = {
   courseTitle: string;
   prof: string;
   isCommunity?: boolean;
-  isCurrentSemester?: boolean;
 };
 
 export type Vod = CourseBase & {