We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

ค้นหาฝ่ายสนับสนุน

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

เรียนรู้เพิ่มเติม

Can not install Firefox. Error cites FF is running and must be closed but can't be found. How close?

  • 1 การตอบกลับ
  • 2 คนมีปัญหานี้
  • 1 ครั้งที่ดู
  • ตอบกลับล่าสุดโดย David McRitchie

more options

The installer says "'FF' is already running but is not responding. To open a new window, you must first close the existing 'FF' process, or restart your system." I have uninstalled it in all acocunts and there are no references to FF anywhere I can find, to include the Task Manager applications.

The installer says "'FF' is already running but is not responding. To open a new window, you must first close the existing 'FF' process, or restart your system." I have uninstalled it in all acocunts and there are no references to FF anywhere I can find, to include the Task Manager applications.

การตอบกลับทั้งหมด (1)

more options

After the download,

  1. bring up the download manager ("Ctrl+J") and start your installs. As soon as the install comes up,
  2. close Firefox with File > Exit or "Firefox" button > Exit. Give Firefox some time to close.
  3. If install does not proceed, terminate "firefox.exe" and "plugin-container.exe" from the "Processes" tab in the Windows Task Manager.
    • Windows 7 shortcut to the WTM is "Ctrl+Shift+Esc"
    • or on any Windows system from "Ctrl+Shift+Esc" then choose Windows Task Manager.
    • Make sure that "firefox.exe" is no longer running -- if it is still running then terminate it by selecting the use "End Process" button or from context menu, and do the same for "plugin-container.exe" if it is found there.
  4. proceed with the install.

เปลี่ยนแปลงโดย David McRitchie เมื่อ