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Why won't Firefox open at all?

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Firefox updated yesterday and ever since then it will not open at all. I am running the latest macOS on a MacBook Air. It just bounces on the Dock once then doesn't open at all. I have tried uninstalling and reinstalling AND I even tried to downgrade back to 70.0.1 and it STILL didn't work. It won't even open in Safe Mode.

Firefox updated yesterday and ever since then it will not open at all. I am running the latest macOS on a MacBook Air. It just bounces on the Dock once then doesn't open at all. I have tried uninstalling and reinstalling AND I even tried to downgrade back to 70.0.1 and it STILL didn't work. It won't even open in Safe Mode.
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額外的系統細節

已安裝的外掛程式

None

應用程式

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.4 Safari/605.1.15

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FredMcD
  • Top 10 Contributor
4351 個解決方法 61154 個答案

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}

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 '''[https://support.mozilla.org/en-US/kb/configure-firewalls-so-firefox-can-access-internet Configure firewalls so that Firefox can access the Internet.]''' {web link}
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提出問題者

It only works if I run it off the downloaded disk drive. Also I am running it on a Mac and my firewall is turned off. I have no internet security software.

It only works if I run it off the downloaded disk drive. Also I am running it on a Mac and my firewall is turned off. I have no internet security software.
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FredMcD
  • Top 10 Contributor
4351 個解決方法 61154 個答案

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

Start your '''Computer''' in safe mode with network support. Then start Firefox. Try '''Secure''' websites. Is the problem still there? http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia
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