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When I try to open Firefox it says "Firefox is already running..."?!

  • 3 replies
  • 7 have this problem
  • 1 view
  • Last reply by FredMcD

Pohaku66
Pohaku66
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This started yesterday after I did a reset of Firefox. It ran perfectly after that but when I closed and tried to reopen the program I constantly get a message saying "Firefox is already running but not responding..."

Here are the steps I've already taken to try and fix the problem:

1. Looked for the Firefox process in my Task Manager to terminate it but couldn't locate it 2. Restarted my computer 3. Tried to open an older version from a restore point but get the same "Firefox is already running.." message. 4. Looked for solutions in mozilla support but couldn't find one that worked.

Please HELP!

This started yesterday after I did a reset of Firefox. It ran perfectly after that but when I closed and tried to reopen the program I constantly get a message saying "Firefox is already running but not responding..." Here are the steps I've already taken to try and fix the problem: 1. Looked for the Firefox process in my Task Manager to terminate it but couldn't locate it 2. Restarted my computer 3. Tried to open an older version from a restore point but get the same "Firefox is already running.." message. 4. Looked for solutions in mozilla support but couldn't find one that worked. Please HELP!

Chosen solution

It turns out that I had accidentally checked the "Read Only" box in the Properties of my AppData folder in my User account. This apparently had somehow prevented Firefox from terminating or restarting... or both, I'm not sure exactly why. After going back and unchecking the Read Only box Firefox started up fine.

Thanks for your suggestion though ideato!

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All Replies (3)

ideato
ideato
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Hello Pohaku66, any luck if you remove the profile lock file ?

thank you

Pohaku66
Pohaku66 Question owner
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Chosen Solution

It turns out that I had accidentally checked the "Read Only" box in the Properties of my AppData folder in my User account. This apparently had somehow prevented Firefox from terminating or restarting... or both, I'm not sure exactly why. After going back and unchecking the Read Only box Firefox started up fine.

Thanks for your suggestion though ideato!

FredMcD
FredMcD
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That is very odd. Something had to activate it.

Please flag your last post as Solved Problem so other will know.