想取消我的选项卡,但 process.kill() 不起作用

Want to kill my tab but process.kill() doesn't work

没有错误,但仍然无法终止进程

import time
import subprocess
total_breaks = 3
break_count = 0
print("This program started on " + time.ctime())
while(break_count < total_breaks):
    time.sleep(5)
    process = subprocess.Popen([r'F:\software\firefox\Firefox.exe',
'-new-tab', 'http://www.google.com/'])
    time.sleep(6)
    process.kill()
    break_count = break_count + 1

我本来想取消我的标签,因为它没有显示错误,但它不起作用。

重新打开后自动运行了...不知道为什么?