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Firefox: SLOW, Uninstalled , Reinstalled, will not open .. Repeated multiple times with no success

  • 3 件の返信
  • 5 人がこの問題に困っています
  • 1 回表示
  • 最後の返信者: TxDan001

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Long time Mozilla product user; Firefox, Thunderbird and other. Firefox became unusable. I deleted Firefox. I installed Firefox. It will not open. I have completely deleted all files/folders related to ALL Mozilla products. Windows 7 64 bit. I have tried 64 bit and 32 bit Firefox with no success. When I click to open I get the blue "working" circle for a few seconds then it stops. Task Manager shows no Firefox activity.

Long time Mozilla product user; Firefox, Thunderbird and other. Firefox became unusable. I deleted Firefox. I installed Firefox. It will not open. I have completely deleted all files/folders related to ALL Mozilla products. Windows 7 64 bit. I have tried 64 bit and 32 bit Firefox with no success. When I click to open I get the blue "working" circle for a few seconds then it stops. Task Manager shows no Firefox activity.

選ばれた解決策

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

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選ばれた解決策

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

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Hi TxDan001, you posted using Firefox Beta (Firefox 57). Is that on a different system? What's the system info for the system that has the problem (Firefox version, OS version)?

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Hello ... thanks for your speedy reply. I found the solution. After multiple Firefox uninstalls/re-installs ... Win7 now using Firefox Quantum browser (awesome!) .. I discovered the problem was in my Avast settings. All is well. Thank you again!