diff --git a/DrissionPage/commons/browser.py b/DrissionPage/commons/browser.py
index 77c4c86..2943609 100644
--- a/DrissionPage/commons/browser.py
+++ b/DrissionPage/commons/browser.py
@@ -158,8 +158,9 @@ def test_connect(ip, port):
             sleep(.2)
 
     if ip in ('127.0.0.1', 'localhost'):
-        raise BrowserConnectError(f'\n连接浏览器失败，可能原因：\n1、{port}端口不是Chromium内核浏览器\n'
-                                  f'2、该浏览器未允许控制\n3、和已打开的浏览器冲突，请关闭')
+        raise BrowserConnectError(f'\n连接浏览器失败，可能原因：\n1、浏览器未启动\n2、{port}端口不是Chromium内核浏览器\n'
+                                  f'3、该浏览器未允许控制\n4、和已打开的浏览器冲突\n'
+                                  f'请尝试用ChromiumOptions指定别的端口和指定浏览器路径')
     raise BrowserConnectError(f'{ip}:{port}浏览器无法链接。')
 
 
diff --git a/DrissionPage/commons/web.py b/DrissionPage/commons/web.py
index f18fee9..e416781 100644
--- a/DrissionPage/commons/web.py
+++ b/DrissionPage/commons/web.py
@@ -268,14 +268,14 @@ def set_browser_cookies(page, cookies):
         d_list = ex_url.subdomain.split('.')
         d_list.append(f'{ex_url.domain}.{ex_url.suffix}' if ex_url.suffix else ex_url.domain)
 
-        for i in range(len(d_list)):
-            d = f'.{".".join(d_list[i:])}'
-            cookie['domain'] = d
-            page.run_cdp_loaded('Network.setCookie', **cookie)
-            if is_cookie_in_driver(page, cookie):
-                break
+        tmp = [d_list[0]]
+        if len(d_list) > 1:
+            for i in d_list[1:]:
+                tmp.append('.')
+                tmp.append(i)
 
-            d = f'{".".join(d_list[i:])}'
+        for i in range(len(tmp)):
+            d = ''.join(tmp[i:])
             cookie['domain'] = d
             page.run_cdp_loaded('Network.setCookie', **cookie)
             if is_cookie_in_driver(page, cookie):