Recent answers to Since few days Firefox doesn't start in my user account anymore. A clean reinstallation die not solve the problem.https://support.mozilla.org/en-US/questions/13466942021-08-17T00:55:44-07:00Hi,
it tooks a while to get the normal user to the safe mode because he wasn't in Administrator grou2021-08-17T00:55:44-07:00john.doehttps://support.mozilla.org/en-US/questions/1346694#answer-1435964<p>Hi,
it tooks a while to get the normal user to the safe mode because he wasn't in Administrator group.
After I was able to start in safe mode as my normal user it was also possible to start the Firefox. Have tried this few times.
After restart the computer in normal mode it's still not possible.
Now I know it will start in safe mode but don't know to find out the reason which make the trouble.
</p>Did you try another reboot ?
You can boot the computer in Windows Safe mode with network suppor2021-08-12T08:01:45-07:00cor-elhttps://support.mozilla.org/en-US/questions/1346694#answer-1434489<p>Did you try another reboot&nbsp;?
</p><p>You can boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.
</p>
<ul><li><a href="https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/" rel="nofollow">https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/</a>
</li><li><a href="https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10/" rel="nofollow">https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10/</a>
</li></ul>@ FredMcD
I remove the Firefox installation also all folder and from both user too. Cleaned up regis2021-08-12T06:03:10-07:00john.doehttps://support.mozilla.org/en-US/questions/1346694#answer-1434469<p>@ FredMcD
I remove the Firefox installation also all folder and from both user too. Cleaned up registry from "Mozilla" and "Firefox" keys. Dowloaded the current Firefox 64 bit (German) version from <a href="http://mozilla.org" rel="nofollow">mozilla.org</a> for new clean installation. On the end I have reboot the computer.
</p><p>@ cor-el
I have done the installation for 64 bit version as descriped and reboot the computer.
</p><p>After both things I have done clicked first time to start the Firefox as normal user. The browser was starting as normal. After I have closed the browser, it was not possible to start Firefoy as normal user.
</p>You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing2021-08-11T08:07:26-07:00cor-elhttps://support.mozilla.org/en-US/questions/1346694#answer-1434184<p>You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.
</p><p>See "Visual Studio 2015, 2017 and 2019":
</p>
<ul><li><a href="https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads" rel="nofollow">https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads</a>
</li><li><a href="https://aka.ms/vs/16/release/vc_redist.x64.exe" rel="nofollow">https://aka.ms/vs/16/release/vc_redist.x64.exe</a>
</li><li><a href="https://aka.ms/vs/16/release/vc_redist.x86.exe" rel="nofollow">https://aka.ms/vs/16/release/vc_redist.x86.exe</a>
</li></ul>
<p>You may not need the latter (32-bit version) if you use 64-bit Firefox.
You may have to reboot the computer.
</p>Let’s do a full clean re-install;
Note: Firefox comes in three or more folders on all computers.2021-08-11T07:59:42-07:00fredmcd-hotmailhttps://support.mozilla.org/en-US/questions/1346694#answer-1434177<p>Let’s do a full clean re-install;
</p><p>Note: Firefox comes in three or more folders on all computers&#46; They are;
</p><p>Maintenance: (Programs Folder) &lt;Windows Only&gt;
Firefox itself: (Programs Folder)
And two folders in the profile of each user on the computer
for each Firefox profile for that user&#46;
</p><p>If you remove the Firefox folder, the user profiles would not be affected&#46;
</p>
<hr>
<p><a href="http://www&#46;mozilla&#46;org/en-US/firefox/all/" rel="nofollow">Download Firefox For All languages And Systems</a> {web link}
</p><p><a href="https://www&#46;mozilla&#46;org/en-US/firefox/organizations/" rel="nofollow">Firefox ESR; Extended Support Release</a> {web link}
</p><p>Beta, Developer, Nightly versions
https://www&#46;mozilla&#46;org/en-US/firefox/channel/desktop/
</p><p><a href="https://support&#46;mozilla&#46;org/en-US/kb/install-older-version-of-firefox?cache=no" rel="nofollow">Install Older Version Of Firefox</a> {web link}
</p><p><br>
Save the file&#46; Then <strong>Close Firefox&#46; </strong>
</p><p>Using your file browser, open the <strong>Programs Folder</strong> on your computer&#46;
</p><p><strong>Windows: </strong> C:\Program Files
C:\Program Files (x86) <strong>Note:</strong> Check Both Folders
</p><p><strong>Mac: </strong> Open the <strong> "Applications" </strong> folder&#46;
https://support&#46;mozilla&#46;org/en-US/kb/how-download-and-install-firefox-mac
</p><p><strong>Linux: </strong> Check your user manual&#46;
If you installed Firefox with the distro-based package
manager, you should use the same way to uninstall it&#46;
See Install Firefox on Linux;
https://support&#46;mozilla&#46;org/en-US/kb/install-firefox-linux
</p><p>If you downloaded and installed the binary package
from the Firefox download page, simply remove the
folder Firefox in your home directory&#46;
http://www&#46;mozilla&#46;org/firefox#desktop
++++++++++++++++++++++++++++
Look for, and remove any <strong>Mozilla</strong> or <strong>Firefox</strong> program folders&#46;
Do not remove the <strong>Mozilla Thunderbird</strong> folder if there is one&#46;
</p><p><strong>Do Not</strong> remove any profile folders&#46;
</p><p>After rebooting the computer, run a registry scanner
if you have one&#46; Then run the installer&#46;
+++++++++++++++++++++++++++
If there is a problem, start your <strong>Computer</strong> in safe mode and try again&#46;
</p><p><a href="http://encyclopedia2&#46;thefreedictionary&#46;com/Linux+Safe+Mode" rel="nofollow">How to Start all Computers in Safe Mode;</a> {web link}
Free Online Encyclopedia
</p>Have done the task according the instruction (also behind the link) three times but no changes in Fi2021-08-11T05:32:54-07:00john.doehttps://support.mozilla.org/en-US/questions/1346694#answer-1434143<p>Have done the task according the instruction (also behind the link) three times but no changes in Firefox behavior. It doesn't start like described before.
</p>Some problems occur when your Internet security program was set
to trust the previous version of Fir2021-08-11T04:54:11-07:00fredmcd-hotmailhttps://support.mozilla.org/en-US/questions/1346694#answer-1434127<p>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&#46; Now how to fix the problem: To allow
Firefox to connect to the Internet again;
</p>
<ul><li> Make sure your Internet security software is up-to-date (i&#46;e&#46; you are running the latest version)&#46;
</li><li> Remove Firefox from your program's list of trusted or recognized programs&#46; For detailed instructions, see
</li></ul>
<p><strong><a href="https://support&#46;mozilla&#46;org/en-US/kb/configure-firewalls-so-firefox-can-access-internet" rel="nofollow">Configure firewalls so that Firefox can access the Internet&#46;</a></strong> {web link}
</p>