diff --git a/CLAUDE.md b/CLAUDE.md
index b65e8a1..b69c97f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -108,7 +108,7 @@ chrome-extension/
 - Tabs are sorted alphabetically by title within each group
 - Only groups with 2+ tabs are created (singles remain ungrouped)
 - Chrome internal pages (`chrome://`, `chrome-extension://`, `about:`) are skipped
-- Each group shows name and tab count: `github.com (25)`
+- Each group shows name only: `github.com`
 - Colors rotate through: blue, red, yellow, green, pink, purple, cyan, orange
 - Bookmark save/restore automatically manages Tab Organizer bookmark folders with timestamps
 - Merge duplicate groups respects protected groups (protected groups absorb but never dissolve)
diff --git a/chrome-extension/e2e/base-domain-and-edge-cases.test.js b/chrome-extension/e2e/base-domain-and-edge-cases.test.js
index 99b049d..a067429 100644
--- a/chrome-extension/e2e/base-domain-and-edge-cases.test.js
+++ b/chrome-extension/e2e/base-domain-and-edge-cases.test.js
@@ -92,7 +92,7 @@ describe('Base Domain Grouping and Edge Cases', () => {
     // Should have one group for github.com (all subdomains grouped together)
     const githubGroup = groups.find(g => g.title.includes('github.com'));
     expect(githubGroup).toBeDefined();
-    expect(githubGroup.title).toBe('github.com (3)');
+    expect(githubGroup.title).toBe('github.com');
 
     console.log('✅ Subdomains grouped by base domain.');
   }, 90000);
@@ -213,7 +213,7 @@ describe('Base Domain Grouping and Edge Cases', () => {
 
     const githubGroup = groups.find(g => g.title.includes('github.com'));
     expect(githubGroup).toBeDefined();
-    expect(githubGroup.title).toBe('github.com (2)');
+    expect(githubGroup.title).toBe('github.com');
 
     console.log('✅ Chrome internal pages skipped.');
   }, 90000);
diff --git a/chrome-extension/e2e/collapsed-group-preservation.test.js b/chrome-extension/e2e/collapsed-group-preservation.test.js
index 842da23..e5195f5 100644
--- a/chrome-extension/e2e/collapsed-group-preservation.test.js
+++ b/chrome-extension/e2e/collapsed-group-preservation.test.js
@@ -190,8 +190,8 @@ describe('Group State Preservation (Collapsed Groups)', () => {
     // Verify color is preserved
     expect(updatedGroup.color).toBe(initialColor);
 
-    // Verify tab count updated
-    expect(updatedGroup.title).toBe('github.com (5)'); // 3 initial + 2 additional
+    // Verify title is preserved
+    expect(updatedGroup.title).toBe('github.com');
 
     console.log('✅ Collapsed state was preserved.');
   }, 90000);
diff --git a/chrome-extension/e2e/combine-groups.test.js b/chrome-extension/e2e/combine-groups.test.js
index f5acc26..10b743d 100644
--- a/chrome-extension/e2e/combine-groups.test.js
+++ b/chrome-extension/e2e/combine-groups.test.js
@@ -214,8 +214,7 @@ describe('Combine Groups Feature', () => {
 
     console.log('Final groups:', finalGroups);
     expect(finalGroups.length).toBe(1);
-    expect(finalGroups[0].title).toContain('github.com');
-    expect(finalGroups[0].title).toContain('5'); // 3 github + 2 google tabs
+    expect(finalGroups[0].title).toBe('github.com');
 
     console.log('✅ Combine two groups test passed!');
 
@@ -354,8 +353,7 @@ describe('Combine Groups Feature', () => {
 
     console.log('Final groups:', finalGroups);
     expect(finalGroups.length).toBe(1);
-    expect(finalGroups[0].title).toContain('github.com');
-    expect(finalGroups[0].title).toContain('7'); // 3 github + 2 google + 2 stackoverflow
+    expect(finalGroups[0].title).toBe('github.com');
 
     console.log('✅ Combine multiple source groups test passed!');
 
diff --git a/chrome-extension/e2e/cross-window-organization.test.js b/chrome-extension/e2e/cross-window-organization.test.js
index 76d2c0e..8bb43ec 100644
--- a/chrome-extension/e2e/cross-window-organization.test.js
+++ b/chrome-extension/e2e/cross-window-organization.test.js
@@ -102,7 +102,7 @@ describe('Cross-Window Tab Organization', () => {
     // Should have created github group with all tabs from both windows
     const githubGroup = groups.find(g => g.title.includes('github.com'));
     expect(githubGroup).toBeDefined();
-    expect(githubGroup.title).toBe('github.com (3)');
+    expect(githubGroup.title).toBe('github.com');
 
     console.log('✅ Cross-window consolidation passed!');
   }, 120000);
@@ -164,7 +164,7 @@ describe('Cross-Window Tab Organization', () => {
 
     const githubGroup = groups.find(g => g.title.includes('github.com'));
     expect(githubGroup).toBeDefined();
-    expect(githubGroup.title).toBe('github.com (2)'); // react + vue (angular duplicate removed)
+    expect(githubGroup.title).toBe('github.com'); // react + vue (angular duplicate removed)
 
     console.log('✅ Cross-window duplicate removal passed!');
   }, 120000);
@@ -216,7 +216,7 @@ describe('Cross-Window Tab Organization', () => {
 
     const developmentGroup = groups.find(g => g.title.includes('Development'));
     expect(developmentGroup).toBeDefined();
-    expect(developmentGroup.title).toBe('Development (4)');
+    expect(developmentGroup.title).toBe('Development');
 
     console.log('✅ Cross-window category organization passed!');
   }, 120000);
@@ -282,7 +282,7 @@ describe('Cross-Window Tab Organization', () => {
 
     const githubGroup = groups.find(g => g.title.includes('github.com'));
     expect(githubGroup).toBeDefined();
-    expect(githubGroup.title).toBe('github.com (3)'); // Only the 3 github tabs
+    expect(githubGroup.title).toBe('github.com');
 
     console.log('✅ Chrome internal pages skipped correctly!');
   }, 120000);
diff --git a/chrome-extension/e2e/first-time-organization.test.js b/chrome-extension/e2e/first-time-organization.test.js
index 829da4e..8563d17 100644
--- a/chrome-extension/e2e/first-time-organization.test.js
+++ b/chrome-extension/e2e/first-time-organization.test.js
@@ -143,11 +143,9 @@ describe('First-Time Organization (Create New Groups)', () => {
     // Verify we have 3 groups (github, google, example)
     expect(groups.length).toBe(3);
 
-    // Verify group titles match expected domains
+    // Verify group titles match expected domains (no longer include tab counts)
     const groupTitles = groups.map(g => g.title).sort();
-    expect(groupTitles).toContain('example.com (3)');
-    expect(groupTitles).toContain('github.com (5)');
-    expect(groupTitles).toContain('google.com (4)');
+    expect(groupTitles).toEqual(['example.com', 'github.com', 'google.com']);
 
     // Step 5: Verify tabs are sorted alphabetically within each group
     const tabs = await serviceWorker.evaluate(async () => {
diff --git a/chrome-extension/e2e/tab-movement-and-ungrouping.test.js b/chrome-extension/e2e/tab-movement-and-ungrouping.test.js
index 44600bf..8a522a9 100644
--- a/chrome-extension/e2e/tab-movement-and-ungrouping.test.js
+++ b/chrome-extension/e2e/tab-movement-and-ungrouping.test.js
@@ -117,8 +117,8 @@ describe('Tab Movement, Ungrouping, Mixed Operations', () => {
     const githubGroup = initialGroups.find(g => g.title.includes('github.com'));
     const googleGroup = initialGroups.find(g => g.title.includes('google.com'));
 
-    expect(githubGroup.title).toBe('github.com (3)');
-    expect(googleGroup.title).toBe('google.com (2)');
+    expect(githubGroup.title).toBe('github.com');
+    expect(googleGroup.title).toBe('google.com');
 
     // Navigate a GitHub tab to google.com
     console.log('Changing one GitHub tab to google.com...');
@@ -152,8 +152,8 @@ describe('Tab Movement, Ungrouping, Mixed Operations', () => {
     const updatedGoogle = updatedGroups.find(g => g.title.includes('google.com'));
 
     // GitHub should have 1 less, Google should have 1 more
-    expect(updatedGithub.title).toBe('github.com (2)');
-    expect(updatedGoogle.title).toBe('google.com (3)');
+    expect(updatedGithub.title).toBe('github.com');
+    expect(updatedGoogle.title).toBe('google.com');
 
     console.log('✅ Tab moved between groups correctly.');
   }, 120000);
@@ -183,7 +183,7 @@ describe('Tab Movement, Ungrouping, Mixed Operations', () => {
     console.log('Groups before closing tab:', groupsBefore);
     const exampleGroup = groupsBefore.find(g => g.title.includes('example.com'));
     expect(exampleGroup).toBeDefined();
-    expect(exampleGroup.title).toBe('example.com (2)');
+    expect(exampleGroup.title).toBe('example.com');
 
     // Close one example.com tab
     console.log('Closing one example.com tab...');
@@ -283,11 +283,11 @@ describe('Tab Movement, Ungrouping, Mixed Operations', () => {
     // Should have created stackoverflow group
     const stackoverflowGroup = groupsAfter.find(g => g.title.includes('stackoverflow.com'));
     expect(stackoverflowGroup).toBeDefined();
-    expect(stackoverflowGroup.title).toBe('stackoverflow.com (3)');
+    expect(stackoverflowGroup.title).toBe('stackoverflow.com');
 
     // Should have updated github group (2 initial + 2 new = 4)
     const githubGroup = groupsAfter.find(g => g.title.includes('github.com'));
-    expect(githubGroup.title).toBe('github.com (4)');
+    expect(githubGroup.title).toBe('github.com');
 
     console.log('✅ Mixed create and update worked correctly.');
   }, 120000);
diff --git a/chrome-extension/e2e/update-existing-groups.test.js b/chrome-extension/e2e/update-existing-groups.test.js
index 3092772..2dba074 100644
--- a/chrome-extension/e2e/update-existing-groups.test.js
+++ b/chrome-extension/e2e/update-existing-groups.test.js
@@ -200,11 +200,9 @@ describe('Re-Organization (Update Existing Groups)', () => {
     const updatedGroupIds = updatedGroups.map(g => g.id).sort();
     expect(updatedGroupIds).toEqual(initialGroupIds.sort());
 
-    // Verify group titles reflect the new tab counts
+    // Verify group titles (no longer include tab counts)
     const groupTitles = updatedGroups.map(g => g.title).sort();
-    expect(groupTitles).toContain('example.com (3)'); // was 2, now 3
-    expect(groupTitles).toContain('github.com (5)');  // was 3, now 5
-    expect(groupTitles).toContain('google.com (4)');  // was 2, now 4
+    expect(groupTitles).toEqual(['example.com', 'github.com', 'google.com']);
 
     // Step 8: Verify tabs are sorted alphabetically within each group
     const allTabs = await serviceWorker.evaluate(async () => {
diff --git a/chrome-extension/src/background/combineGroups.js b/chrome-extension/src/background/combineGroups.js
index 802de92..c835fde 100644
--- a/chrome-extension/src/background/combineGroups.js
+++ b/chrome-extension/src/background/combineGroups.js
@@ -32,7 +32,7 @@ export async function combineGroups(sourceGroupIds, targetGroupId) {
     };
   }
 
-  // Get current target tab count for final count calculation
+  // Get current target tab count for status message display
   const targetTabs = await chrome.tabs.query({ groupId: targetGroupId });
   const tabsMoved = allSourceTabs.length;
   const newTargetTabCount = targetTabs.length + tabsMoved;
@@ -41,9 +41,9 @@ export async function combineGroups(sourceGroupIds, targetGroupId) {
   const sourceTabIds = allSourceTabs.map(tab => tab.id);
   await chrome.tabs.group({ tabIds: sourceTabIds, groupId: targetGroupId });
 
-  // Update target group title with new count
+  // Update target group title
   await chrome.tabGroups.update(targetGroupId, {
-    title: `${targetGroupName} (${newTargetTabCount})`
+    title: targetGroupName
   });
 
   return {
diff --git a/chrome-extension/src/background/combineGroups.test.js b/chrome-extension/src/background/combineGroups.test.js
index 0292214..f175c36 100644
--- a/chrome-extension/src/background/combineGroups.test.js
+++ b/chrome-extension/src/background/combineGroups.test.js
@@ -59,7 +59,7 @@ describe('combineGroups', () => {
         groupId: 2,
       });
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(2, {
-        title: 'Development (7)',
+        title: 'Development',
       });
       expect(result).toEqual({
         sourceGroupNames: ['Documentation'],
@@ -132,7 +132,7 @@ describe('combineGroups', () => {
         groupId: 2,
       });
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(2, {
-        title: 'Development (9)',
+        title: 'Development',
       });
       expect(result).toEqual({
         sourceGroupNames: ['Documentation', 'Research'],
diff --git a/chrome-extension/src/background/mergeDuplicateGroups.js b/chrome-extension/src/background/mergeDuplicateGroups.js
index 6ad2172..963a900 100644
--- a/chrome-extension/src/background/mergeDuplicateGroups.js
+++ b/chrome-extension/src/background/mergeDuplicateGroups.js
@@ -110,10 +110,9 @@ async function mergeDuplicateGroups() {
         try {
           await chrome.tabs.group({ tabIds: allSourceTabIds, groupId: targetGroupData.group.id });
 
-          // Update target group title with new count
-          const newTabCount = targetGroupData.tabCount + allSourceTabIds.length;
+          // Update target group title
           await chrome.tabGroups.update(targetGroupData.group.id, {
-            title: `${baseName} (${newTabCount})`
+            title: baseName
           });
 
           mergedGroups += sourceGroupsData.length;
diff --git a/chrome-extension/src/background/mergeDuplicateGroups.test.js b/chrome-extension/src/background/mergeDuplicateGroups.test.js
index 78a996c..61a0da7 100644
--- a/chrome-extension/src/background/mergeDuplicateGroups.test.js
+++ b/chrome-extension/src/background/mergeDuplicateGroups.test.js
@@ -55,7 +55,7 @@ describe('mergeDuplicateGroups', () => {
         groupId: 1,
       });
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(1, {
-        title: 'github.com (15)',
+        title: 'github.com',
       });
       expect(result.mergedGroups).toBe(1);
       expect(result.tabsMoved).toBe(5);
@@ -134,7 +134,7 @@ describe('mergeDuplicateGroups', () => {
         groupId: 2,
       });
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(2, {
-        title: 'github.com (15)',
+        title: 'github.com',
       });
     });
 
diff --git a/chrome-extension/src/background/organizeTabs.js b/chrome-extension/src/background/organizeTabs.js
index 5e5804f..a192a33 100644
--- a/chrome-extension/src/background/organizeTabs.js
+++ b/chrome-extension/src/background/organizeTabs.js
@@ -210,9 +210,9 @@ async function organizeTabs(mode = 'domain', allWindows = false) {
           await chrome.tabs.ungroup(toRemove);
         }
 
-        // Update group title with new count (preserve color and collapsed state)
+        // Update group title (preserve color and collapsed state)
         await chrome.tabGroups.update(existingGroup.id, {
-          title: `${groupName} (${newTabIds.length})`
+          title: groupName
         });
 
         groupsUpdated++;
@@ -221,7 +221,7 @@ async function organizeTabs(mode = 'domain', allWindows = false) {
         const groupId = await chrome.tabs.group({ tabIds: newTabIds });
 
         await chrome.tabGroups.update(groupId, {
-          title: `${groupName} (${newTabIds.length})`,
+          title: groupName,
           color: getNextColor(),
           collapsed: false
         });
diff --git a/chrome-extension/src/background/organizeTabs.test.js b/chrome-extension/src/background/organizeTabs.test.js
index 75a3016..3128dcf 100644
--- a/chrome-extension/src/background/organizeTabs.test.js
+++ b/chrome-extension/src/background/organizeTabs.test.js
@@ -189,9 +189,9 @@ describe('organizeTabs', () => {
       expect(chrome.tabs.ungroup).not.toHaveBeenCalledWith(1);
       expect(chrome.tabs.ungroup).not.toHaveBeenCalledWith(2);
 
-      // Should update the existing group title (even though count didn't change)
+      // Should update the existing group title
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(5, {
-        title: 'github.com (2)'
+        title: 'github.com'
       });
 
       // Should NOT create a new group
@@ -210,7 +210,7 @@ describe('organizeTabs', () => {
       await organizeTabs('domain');
 
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(1, {
-        title: 'github.com (2)',
+        title: 'github.com',
         color: 'blue',
         collapsed: false
       });
@@ -231,12 +231,12 @@ describe('organizeTabs', () => {
 
       expect(chrome.tabs.group).toHaveBeenCalledTimes(2);
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(1, {
-        title: 'localhost (2)',
+        title: 'localhost',
         color: 'blue',
         collapsed: false
       });
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(2, {
-        title: 'local-network (2)',
+        title: 'local-network',
         color: 'red',
         collapsed: false
       });
@@ -268,9 +268,9 @@ describe('organizeTabs', () => {
         groupId: 5
       });
 
-      // Should update group title with new count
+      // Should update group title
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(5, {
-        title: 'github.com (4)'
+        title: 'github.com'
       });
 
       // Should NOT ungroup any tabs
@@ -298,9 +298,9 @@ describe('organizeTabs', () => {
       // Note: chrome.tabs.ungroup is called with array from within group diff logic
       expect(chrome.tabs.ungroup).toHaveBeenCalledWith([3]);
 
-      // Should update group title with new count
+      // Should update group title
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(5, {
-        title: 'github.com (2)'
+        title: 'github.com'
       });
     });
 
@@ -328,7 +328,7 @@ describe('organizeTabs', () => {
 
       // Should update existing github group (no changes needed)
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(5, {
-        title: 'github.com (2)'
+        title: 'github.com'
       });
 
       // Should create new stackoverflow group
@@ -336,7 +336,7 @@ describe('organizeTabs', () => {
         tabIds: [3, 4]
       });
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(7, {
-        title: 'stackoverflow.com (2)',
+        title: 'stackoverflow.com',
         color: 'blue',
         collapsed: false
       });
@@ -398,8 +398,8 @@ describe('organizeTabs', () => {
       // Check that both groups were created with correct titles
       const updateCalls = chrome.tabGroups.update.mock.calls;
       const titles = updateCalls.map(call => call[1].title);
-      expect(titles).toContain('Development (3)');
-      expect(titles).toContain('Documentation (2)');
+      expect(titles).toContain('Development');
+      expect(titles).toContain('Documentation');
     });
 
     test('should categorize social media sites correctly', async () => {
@@ -420,7 +420,7 @@ describe('organizeTabs', () => {
       // Check the title of the created group
       const updateCalls = chrome.tabGroups.update.mock.calls;
       const lastCall = updateCalls[updateCalls.length - 1];
-      expect(lastCall[1].title).toBe('Social Media (3)');
+      expect(lastCall[1].title).toBe('Social Media');
     });
 
     test('should categorize shopping sites correctly', async () => {
@@ -440,7 +440,7 @@ describe('organizeTabs', () => {
       // Check the title of the created group
       const updateCalls = chrome.tabGroups.update.mock.calls;
       const lastCall = updateCalls[updateCalls.length - 1];
-      expect(lastCall[1].title).toBe('Shopping (2)');
+      expect(lastCall[1].title).toBe('Shopping');
     });
 
     test('should categorize cloud services correctly', async () => {
@@ -461,7 +461,7 @@ describe('organizeTabs', () => {
       // Check the title of the created group
       const updateCalls = chrome.tabGroups.update.mock.calls;
       const lastCall = updateCalls[updateCalls.length - 1];
-      expect(lastCall[1].title).toBe('Cloud Services (2)');
+      expect(lastCall[1].title).toBe('Cloud Services');
     });
 
     test('should group uncategorized tabs as "Other"', async () => {
@@ -504,9 +504,9 @@ describe('organizeTabs', () => {
         groupId: 5
       });
 
-      // Should update group title with new count
+      // Should update group title
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(5, {
-        title: 'Development (3)'
+        title: 'Development'
       });
     });
   });
@@ -680,7 +680,7 @@ describe('organizeTabs', () => {
       expect(updateCalls[9][1].color).toBe('red');
     });
 
-    test('should include tab count in group title', async () => {
+    test('should use domain name only as group title', async () => {
       const mockTabs = [
         { id: 1, url: 'https://github.com/r1', title: 'R1', groupId: -1 },
         { id: 2, url: 'https://github.com/r2', title: 'R2', groupId: -1 },
@@ -693,7 +693,7 @@ describe('organizeTabs', () => {
       await organizeTabs('domain');
 
       expect(chrome.tabGroups.update).toHaveBeenCalledWith(1, {
-        title: 'github.com (3)',
+        title: 'github.com',
         color: 'blue',
         collapsed: false
       });
diff --git a/chrome-extension/src/utils/extractGroupBaseName.js b/chrome-extension/src/utils/extractGroupBaseName.js
index 7390fd4..1e8ffd8 100644
--- a/chrome-extension/src/utils/extractGroupBaseName.js
+++ b/chrome-extension/src/utils/extractGroupBaseName.js
@@ -3,14 +3,16 @@
 
 /**
  * Extracts the base name from a group title by removing the tab count suffix.
- * This allows matching existing groups with new grouping operations.
+ * Primarily used for backward compatibility with older group formats that
+ * included tab counts in the title. Also enables matching existing groups
+ * with new grouping operations regardless of their title format.
  *
  * Examples:
- * - "github.com (15)" → "github.com"
- * - "acme.com (5)" → "acme.com"
+ * - "github.com (15)" → "github.com"  // Legacy format with count
+ * - "github.com" → "github.com"        // Current format (unchanged)
  * - "Development (10)" → "Development"
  *
- * @param {string} groupTitle - The full group title with count
+ * @param {string} groupTitle - The group title (with or without count suffix)
  * @returns {string} The base name without the count suffix
  */
 function extractGroupBaseName(groupTitle) {