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When I launch Start Tor Browser.exe it indicates that the circuit is established but then immediately gives the following error message:

Firefox is already running, but not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

This happens even though Firefox is not running. How can I resolve this issue?

Andrew Lott
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okhotnik
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2 Answers2

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Whenever I've got that message, it's been because a Firefox process actually was running, even though there was no Firefox window. Since it sounds like you're running Windows, have you tried Ctrl-Alt-Del to open the system manager and looked for a Firefox process? If you find one, try killing it.

Kurious
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I had a similar problem, though the firefox process was closed. Additionally if I tried to open TorBrowser parallel to normal Firefox it just opened another (normal) Firefox window. I had installed TorBrowser on C:\Program Files\Tor Browser. Try to extract the Tor Browser Bundle on another partition, on an external harddrive or an USB-stick. This worked in my case.

KalleBlomquist
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