Recent answers to Crashes can only open in Safe Modehttps://support.mozilla.org/ar/questions/10310372014-12-24T07:42:20-08:00Thanks Jscher! Sorry for my confusion.
2014-12-24T07:42:20-08:00rbfreemontanahttps://support.mozilla.org/ar/questions/1031037#answer-669093<p>Thanks Jscher! Sorry for my confusion.
</p>Hi rbfreemontana, this thread refers to Firefox on Windows. Since you are posting about Thunderbird 2014-12-24T07:17:41-08:00jscher2000https://support.mozilla.org/ar/questions/1031037#answer-669084<p>Hi rbfreemontana, this thread refers to Firefox on Windows. Since you are posting about Thunderbird on Mac, it would be less confusing to continue with your recently posted question here: <a href="https://support.mozilla.org/questions/1038041" rel="nofollow">https://support.mozilla.org/questions/1038041</a>
</p>In the Advanced Tab, neither General nor the other tabs have a Use hardware acceleration when availa2014-12-24T06:54:49-08:00rbfreemontanahttps://support.mozilla.org/ar/questions/1031037#answer-669079<p>In the Advanced Tab, neither General nor the other tabs have a <i>Use hardware acceleration when available</i> checkbox on the version I'm using -- the latest update of T-bird and Yosemite.
</p>Hello,
Try disabling graphics hardware acceleration while you are in safe mode, and then restart nor2014-11-14T02:24:13-08:00CoryMHhttps://support.mozilla.org/ar/questions/1031037#answer-653222<p>Hello,
</p><p>Try disabling graphics hardware acceleration while you are in safe mode, and then restart normally.
</p>
<ol><li> Click the menu button <img class="wiki-image frameless" src="https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/gallery/images/2014-01-10-13-08-08-f52b8c.png" alt="New Fx Menu" title=""> and select <em>Options</em>
</li><li>In the Firefox Options (or Preferences) window, click the <em>Advanced</em> tab, then select <em>General</em>.
</li><li>In the settings list, you should find the <em>Use hardware acceleration when available</em> checkbox. Uncheck this checkbox.
</li><li>Now, restart Firefox normally and see if the problems persist.
</li></ol>
<p>Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:
</p>
<ul><li> <a href="/en-US/kb/troubleshoot-extensions-themes-to-fix-problems" rel="nofollow">Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems</a>
</li><li> <a href="/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration" rel="nofollow">Upgrade your graphics drivers to use hardware acceleration and WebGL</a>
</li></ul>
<p>Did this fix your problems? Please report back to us!
</p>