diff --git a/extension/background.js b/extension/background.js
index 65fa179..0313634 100644
--- a/extension/background.js
+++ b/extension/background.js
@@ -444,22 +444,31 @@ async function groupMove({ group, forward, backward }) {
   const allTabs = await chrome.tabs.query({ windowId: groupInfo.windowId });
   allTabs.sort((a, b) => a.index - b.index);
 
-  const groupTabs = allTabs.filter(t => t.groupId === groupId);
-  if (!groupTabs.length) throw new Error(`No tabs found in group '${group}'`);
+  const blocks = buildTabBlocks(allTabs);
+  const currentIdx = blocks.findIndex(block => block.groupId === groupId);
+  if (currentIdx === -1) throw new Error(`No tabs found in group '${group}'`);
 
-  const firstIdx = groupTabs[0].index;
-  const lastIdx  = groupTabs[groupTabs.length - 1].index;
+  const currentBlock = blocks[currentIdx];
+  const currentLength = currentBlock.tabIds.length;
 
   if (forward) {
-    const tabAfter = allTabs.find(t => t.index > lastIdx && t.groupId !== groupId);
-    if (!tabAfter) return { groupId, moved: false };
-    await chrome.tabs.move(groupTabs.map(t => t.id), { index: tabAfter.index + 1 });
+    const nextBlock = blocks[currentIdx + 1];
+    if (!nextBlock) return { groupId, moved: false };
+    const targetIndex =
+      nextBlock.groupId === null
+        ? currentBlock.startIndex + 1
+        : nextBlock.endIndex - currentLength + 1;
+    await chrome.tabGroups.move(groupId, { index: targetIndex });
   } else if (backward) {
-    const tabsBefore = allTabs.filter(t => t.index < firstIdx && t.groupId !== groupId);
-    const tabBefore = tabsBefore[tabsBefore.length - 1];
-    if (!tabBefore) return { groupId, moved: false };
-    await chrome.tabs.move(groupTabs.map(t => t.id), { index: tabBefore.index });
+    const previousBlock = blocks[currentIdx - 1];
+    if (!previousBlock) return { groupId, moved: false };
+    const targetIndex =
+      previousBlock.groupId === null
+        ? currentBlock.startIndex - 1
+        : previousBlock.startIndex;
+    await chrome.tabGroups.move(groupId, { index: targetIndex });
   }
+
   return { groupId, moved: true };
 }
 
@@ -597,28 +606,74 @@ function contentDispatch(funcName, args) {
 
 async function sessionSave({ name }) {
   const tabs = await chrome.tabs.query({});
-  const urls = tabs.map(t => t.url).filter(Boolean);
+  const groups = await chrome.tabGroups.query({});
+  const groupById = new Map(groups.map(group => [group.id, group]));
+  const sessionTabs = tabs
+    .filter(tab => Boolean(tab.url))
+    .sort((a, b) => (a.windowId - b.windowId) || (a.index - b.index))
+    .map(tab => {
+      const entry = { url: tab.url };
+      if (tab.groupId >= 0) {
+        const group = groupById.get(tab.groupId);
+        entry.group = {
+          key: `${tab.windowId}:${tab.groupId}`,
+          title: group?.title || "",
+          color: normalizeGroupColor(group?.color),
+          collapsed: Boolean(group?.collapsed),
+        };
+      }
+      return entry;
+    });
   const sessions = await getSessions();
-  sessions[name] = { urls, savedAt: Date.now() };
+  sessions[name] = {
+    tabs: sessionTabs,
+    urls: sessionTabs.map(tab => tab.url),
+    savedAt: Date.now(),
+  };
   await chrome.storage.local.set({ sessions });
-  return { name, tabs: urls.length };
+  return { name, tabs: sessionTabs.length };
 }
 
 async function sessionLoad({ name }) {
   const sessions = await getSessions();
   const session = sessions[name];
   if (!session) throw new Error(`Session '${name}' not found`);
-  for (const url of session.urls) {
-    await chrome.tabs.create({ url, active: false });
+
+  const sessionTabs = getSessionTabs(session);
+  const createdTabs = [];
+
+  for (const entry of sessionTabs) {
+    const tab = await chrome.tabs.create({ url: entry.url, active: false });
+    createdTabs.push({ tabId: tab.id, entry });
   }
-  return { name, tabs: session.urls.length };
+
+  const groups = new Map();
+  for (const { tabId, entry } of createdTabs) {
+    if (!entry.group) continue;
+    const key = entry.group.key || `${entry.group.title || "group"}:${groups.size}`;
+    if (!groups.has(key)) {
+      groups.set(key, { meta: entry.group, tabIds: [] });
+    }
+    groups.get(key).tabIds.push(tabId);
+  }
+
+  for (const { meta, tabIds } of groups.values()) {
+    const restoredGroupId = await chrome.tabs.group({ tabIds });
+    await chrome.tabGroups.update(restoredGroupId, {
+      title: meta.title || "",
+      color: normalizeGroupColor(meta.color),
+      collapsed: Boolean(meta.collapsed),
+    });
+  }
+
+  return { name, tabs: sessionTabs.length };
 }
 
 async function sessionList() {
   const sessions = await getSessions();
   return Object.entries(sessions).map(([name, s]) => ({
     name,
-    tabs: (s.urls || []).length,
+    tabs: getSessionTabs(s).length,
     savedAt: s.savedAt || null,
   }));
 }
@@ -633,8 +688,8 @@ async function sessionRemove({ name }) {
 
 async function sessionDiff({ nameA, nameB }) {
   const sessions = await getSessions();
-  const a = new Set((sessions[nameA]?.urls) || []);
-  const b = new Set((sessions[nameB]?.urls) || []);
+  const a = new Set(getSessionTabs(sessions[nameA]).map(tab => tab.url));
+  const b = new Set(getSessionTabs(sessions[nameB]).map(tab => tab.url));
   return {
     added:   [...b].filter(u => !a.has(u)),
     removed: [...a].filter(u => !b.has(u)),
@@ -692,6 +747,45 @@ async function resolveGroupId(nameOrId) {
   return match.id;
 }
 
+function buildTabBlocks(tabs) {
+  const blocks = [];
+  for (const tab of tabs) {
+    const normalizedGroupId = tab.groupId >= 0 ? tab.groupId : null;
+    const lastBlock = blocks[blocks.length - 1];
+    if (lastBlock?.groupId === normalizedGroupId) {
+      lastBlock.tabIds.push(tab.id);
+      lastBlock.endIndex = tab.index;
+      continue;
+    }
+
+    blocks.push({
+      groupId: normalizedGroupId,
+      startIndex: tab.index,
+      endIndex: tab.index,
+      tabIds: [tab.id],
+    });
+  }
+  return blocks;
+}
+
+function getSessionTabs(session) {
+  if (!session) return [];
+  if (Array.isArray(session.tabs)) {
+    return session.tabs
+      .map(entry => typeof entry === "string" ? { url: entry } : entry)
+      .filter(entry => entry?.url);
+  }
+  if (Array.isArray(session.urls)) {
+    return session.urls.filter(Boolean).map(url => ({ url }));
+  }
+  return [];
+}
+
+function normalizeGroupColor(color) {
+  const allowed = new Set(["grey", "blue", "red", "yellow", "green", "pink", "purple", "cyan", "orange"]);
+  return allowed.has(color) ? color : "grey";
+}
+
 async function getAliases() {
   const { windowAliases } = await chrome.storage.local.get("windowAliases");
   return windowAliases || {};
diff --git a/tests/test_groups.py b/tests/test_groups.py
index 7a3acd6..eba25f1 100644
--- a/tests/test_groups.py
+++ b/tests/test_groups.py
@@ -131,3 +131,61 @@ def test_group_tabs_returns_list(browser):
                 browser("tabs.close", {"tabId": t["id"]})
             except Exception:
                 pass
+
+
+def test_group_move_forward_swaps_adjacent_group_blocks(browser):
+    group_a = browser("group.open", {"name": "__move_group_a__"})
+    group_b = browser("group.open", {"name": "__move_group_b__"})
+    gid_a = group_a["id"]
+    gid_b = group_b["id"]
+
+    created_tab_ids = set()
+
+    try:
+        extra_a = browser("group.add_tab", {"group": str(gid_a), "url": "https://example.com/?group=a"})
+        extra_b = browser("group.add_tab", {"group": str(gid_b), "url": "https://example.com/?group=b"})
+        created_tab_ids.update([extra_a["tabId"], extra_b["tabId"]])
+
+        tabs_before = browser("tabs.list")
+        block_order_before = [
+            t["groupId"] for t in tabs_before
+            if t.get("groupId") in {gid_a, gid_b}
+        ]
+        assert block_order_before
+        assert block_order_before[0] == gid_a
+
+        browser("group.move", {"group": str(gid_a), "forward": True})
+
+        tabs_after = browser("tabs.list")
+        grouped_after = [
+            t for t in tabs_after
+            if t.get("groupId") in {gid_a, gid_b}
+        ]
+
+        assert grouped_after
+        assert grouped_after[0]["groupId"] == gid_b
+        assert grouped_after[-1]["groupId"] == gid_a
+
+        group_ids_after = {t["id"]: t["groupId"] for t in grouped_after}
+        for t in browser("group.tabs", {"groupId": gid_a}):
+            assert group_ids_after[t["id"]] == gid_a
+        for t in browser("group.tabs", {"groupId": gid_b}):
+            assert group_ids_after[t["id"]] == gid_b
+    finally:
+        for gid in (gid_a, gid_b):
+            try:
+                group_tabs = browser("group.tabs", {"groupId": gid})
+            except Exception:
+                group_tabs = []
+            try:
+                browser("group.close", {"groupId": gid})
+            except Exception:
+                pass
+            for t in group_tabs:
+                created_tab_ids.add(t["id"])
+
+        for tab_id in created_tab_ids:
+            try:
+                browser("tabs.close", {"tabId": tab_id})
+            except Exception:
+                pass
diff --git a/tests/test_session.py b/tests/test_session.py
index 88cc243..d9528a0 100644
--- a/tests/test_session.py
+++ b/tests/test_session.py
@@ -38,9 +38,62 @@ def test_session_remove(browser):
     assert SESSION_NAME + "_remove" not in names
 
 
+def test_session_load_restores_group_metadata(browser):
+    session_name = SESSION_NAME + "_groups"
+    group_name = "__session_group_restore__"
+    group_url = "https://example.com/?session-group=1"
+
+    group = browser("group.open", {"name": group_name})
+    gid = group["id"]
+    created_ids = set()
+
+    try:
+        added = browser("group.add_tab", {"group": str(gid), "url": group_url})
+        created_ids.add(added["tabId"])
+
+        browser("session.save", {"name": session_name})
+
+        original_tabs = browser("group.tabs", {"groupId": gid})
+        created_ids.update(t["id"] for t in original_tabs)
+        browser("group.close", {"groupId": gid})
+        for tab_id in list(created_ids):
+            try:
+                browser("tabs.close", {"tabId": tab_id})
+            except Exception:
+                pass
+
+        baseline_ids = {t["id"] for t in browser("tabs.list")}
+        browser("session.load", {"name": session_name})
+
+        tabs_after = browser("tabs.list")
+        loaded_ids = {t["id"] for t in tabs_after} - baseline_ids
+
+        restored_groups = browser("group.query", {"search": group_name})
+        assert restored_groups, "Expected saved group to be restored"
+
+        restored = next((g for g in restored_groups if g.get("title") == group_name), None)
+        assert restored is not None
+
+        restored_tabs = browser("group.tabs", {"groupId": restored["id"]})
+        restored_urls = {t["url"] for t in restored_tabs}
+        assert group_url in restored_urls
+
+        browser("group.close", {"groupId": restored["id"]})
+        for tab_id in loaded_ids:
+            try:
+                browser("tabs.close", {"tabId": tab_id})
+            except Exception:
+                pass
+    finally:
+        try:
+            browser("session.remove", {"name": session_name})
+        except Exception:
+            pass
+
+
 def teardown_module(module):
     """Clean up test sessions after all tests run."""
-    for name in [SESSION_NAME, SESSION_NAME + "_a", SESSION_NAME + "_b"]:
+    for name in [SESSION_NAME, SESSION_NAME + "_a", SESSION_NAME + "_b", SESSION_NAME + "_groups"]:
         try:
             send_command("session.remove", {"name": name})
         except Exception: