Recent answers to Firefox will not start anymore on Windows 10 Prohttps://support.mozilla.org/ar/questions/11410322016-10-20T17:14:45-07:00hi, mozilla just released an update to firefox 49.0.2 that should fix a problem that sound pretty si2016-10-20T17:14:45-07:00philipphttps://support.mozilla.org/ar/questions/1141032#answer-928612<p>hi, mozilla just released an update to firefox 49.0.2 <a href="https://www.mozilla.org/en-US/firefox/49.0.2/releasenotes/" rel="nofollow">that should fix a problem</a> that sound pretty similar to what you've described. you can download this new version from <a href="https://www.mozilla.org/en-US/firefox/all/" rel="nofollow">https://www.mozilla.org/en-US/firefox/all/</a> to see if it works for you too.
</p>If you are still having problems, let us know.
You can try reloading the last version that worked fo2016-09-28T03:55:18-07:00fredmcd-hotmailhttps://support.mozilla.org/ar/questions/1141032#answer-921956<p>If you are still having problems, let us know.
You can try reloading the last version that worked for you.
</p><p>Look for the directory of the version that you want.
<strong><a href="https://support.mozilla.org/en-US/kb/install-older-version-of-firefox" rel="nofollow">Install an older version of Firefox</a></strong> {web link}
But remember that old versions may have security issues.
</p>Many have been having problems with v49 and now v50.
Let’s do a full clean re-install;
Download Fire2016-09-28T03:53:42-07:00fredmcd-hotmailhttps://support.mozilla.org/ar/questions/1141032#answer-921955<p>Many have been having problems with v49 and now v50.
</p><p>Let’s do a full clean re-install;
<strong><a href="http://www.mozilla.org/en-US/firefox/all/" rel="nofollow">Download Firefox For All languages And Systems</a></strong> {web link}
Save the file. Then <strong>Close Firefox.</strong>
</p><p>Using your file browser, open the <strong>Programs Folder</strong> on your computer.
</p><p><strong>Windows:</strong> C:\Program Files
C:\Program Files (x86)
<strong>Mac:</strong> Open the "Applications" folder.<br><a href="https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac" rel="nofollow">https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac</a>
<strong>Linux:</strong> Check your user manual.
If you installed Firefox with the distro-based package manager,
you should use the same way to uninstall it - see Install <a href="https://support.mozilla.org/en-US/kb/install-firefox-linux" rel="nofollow">Firefox on Linux</a>.
If you downloaded and installed the binary package
from the <a href="http://www.mozilla.org/firefox#desktop" rel="nofollow">Firefox download page,</a> simply remove the folder
Firefox in your home directory.
</p><p><strong>Do Not</strong> remove the profiles folder.
</p><p>Look for, and rename any <strong>Mozilla</strong> or <strong>Firefox</strong> program folders by adding
<strong>.old</strong> to them. Do not rename the <strong>Mozilla Thunderbird</strong> folder.
</p><p>After rebooting the computer, run a registry scanner. Then run the installer.
If all goes well, remove the OLD folders when you are done.
</p>
<hr>
<p>If there is a problem, start your <strong>Computer</strong> in safe mode and try again.
</p><p><strong><a href="http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode" rel="nofollow">Starting The Computer In Safe Mode;<br>Free Online Encyclopedia</a></strong>
</p>