Recent answers to Cannot launch FF versions 43+ because "mozglue.dll is missing" - when it's nothttps://support.mozilla.org/en-US/questions/11490752016-12-02T08:35:15-08:00Let’s do a full clean re-install;
Download Firefox For All languages And Systems {web link}
Save the2016-12-02T08:35:15-08:00fredmcd-hotmailhttps://support.mozilla.org/en-US/questions/1149075#answer-941059<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 if there is one.
</p><p>After rebooting the computer, run a registry scanner if you have one. 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>Separate Security Issue: Update your Flash Player
Note: Windows users should download the active_x f2016-12-02T08:34:19-08:00fredmcd-hotmailhttps://support.mozilla.org/en-US/questions/1149075#answer-941058<p>Separate Security Issue: Update your Flash Player
<strong>Note: Windows users</strong> should download the <strong>active_x</strong> for <em>Internet Explorer.</em>
<strong>and</strong> the <strong>plugin</strong> for <em>Plugin-based browsers</em> (like Firefox).
</p><p><strong>Note: Windows 8 and Windows 10</strong> have built-in flash players and Adobe
will cause a conflict. Install the <strong>plugin only.</strong> Not the <strong>active_x.</strong>
</p><p>Flash Player <strong>Version: 23.0.0. 207</strong>
Flash Player (Linux) <strong>Version 11.2. 202.644</strong>
</p><p><a href="https://get.adobe.com/flashplayer/" rel="nofollow">https://get.adobe.com/flashplayer/</a>
Direct link scans current system and browser
<strong>Note: Other software</strong> is offered in the download. &lt;Windows Only&gt;
</p><p><a href="https://get.adobe.com/flashplayer/otherversions/" rel="nofollow">https://get.adobe.com/flashplayer/otherversions/</a>
Step 1: Select Operating System
Step 2: Select A Version (Firefox, Win IE . . . .)
<strong>Note: Other software</strong> is offered in the download. &lt;Windows Only&gt;
</p>
<hr>
<p>See if there are updates for your graphics drivers
<a href="https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration" rel="nofollow">https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration</a>
</p>