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firefox wont open at all after installation. why?

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  • Seneste svar af cor-el

After installing firefox. I tried to open it from the taskbar AND the shortcut on the desktop and it wont open. I deleted it and installed it again and the same problem occurs. After the second download it opens but its just blank and doesn't do anything, then when I click on the tab it says that it isn't responding and this happens every time I tried to open it for the past 2 days.

After installing firefox. I tried to open it from the taskbar AND the shortcut on the desktop and it wont open. I deleted it and installed it again and the same problem occurs. After the second download it opens but its just blank and doesn't do anything, then when I click on the tab it says that it isn't responding and this happens every time I tried to open it for the past 2 days.

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Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options)
key, and then starting Firefox. Is the problem still there?

While in Safe Mode,

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select Network. Look for Configure How Firefox Connects and press the Settings button. If you are using a proxy, make sure those settings are correct. If there is no proxy, first use No Proxy. If there is a problem, then try System Proxy.


Some problems occurs 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}

It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.

See:


Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.


Create a new profile as a test to check if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.