How do I get tumblr videos to stop showing the "video failed to load" screen, this only happens on firefox and not google chrome 的最新解答https://support.mozilla.org/zh-TW/questions/9742702013-10-14T09:59:44-07:00Do you have issues with videos on other sites, or just Tumblr?
If the above steps don't help, can yo2013-10-14T09:59:44-07:00jscher2000https://support.mozilla.org/zh-TW/questions/974270#answer-489854<p>Do you have issues with videos on other sites, or just Tumblr?
</p><p>If the above steps don't help, can you post a link to a page that has this problem? If some video load and some don't, please point out the ones that have the problem.
</p>Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may2013-10-14T09:45:34-07:00ComputerWhizhttps://support.mozilla.org/zh-TW/questions/974270#answer-489848<p>Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
</p><p>You can try these free programs to scan for malware, which work with your existing antivirus software:
</p>
<ul><li> <a href="http://www.microsoft.com/security/scanner/default.aspx" rel="nofollow">Microsoft Safety Scanner</a>
</li><li> <a href="http://www.malwarebytes.org/products/malwarebytes_free/" rel="nofollow">MalwareBytes' Anti-Malware</a>
</li><li> <a href="http://support.kaspersky.com/faq/?qid=208283363" rel="nofollow">TDSSKiller - AntiRootkit Utility</a>
</li><li> <a href="http://www.surfright.nl/en/hitmanpro/" rel="nofollow">Hitman Pro</a>
</li><li> <a href="http://www.eset.com/us/online-scanner/" rel="nofollow">ESET Online Scanner</a>
</li></ul>
<p><a href="http://windows.microsoft.com/MSE" rel="nofollow">Microsoft Security Essentials</a> is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
</p><p><br>
Further information can be found in the <a href="/en-US/kb/troubleshoot-firefox-issues-caused-malware" rel="nofollow">Troubleshoot Firefox issues caused by malware</a> article.
</p><p>Did this fix your problems? Please report back soon.
</p>Please check if all your plugins are up-to-date. To do this, go to the Mozilla Plugin Check site.
O2013-10-14T09:45:20-07:00ComputerWhizhttps://support.mozilla.org/zh-TW/questions/974270#answer-489847<p>Please check if all your plugins are up-to-date. To do this, go to the <a href="http://mozilla.com/plugincheck" rel="nofollow">Mozilla Plugin Check site</a>.
</p><p>Once you're there, the site will check if all your plugins have the latest versions.
If you see plugins in the list that have a yellow <em>Update</em> button or a red <em>Update now</em> button, please update these immediately.
</p><p>To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.
</p>Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which di2013-10-14T09:45:12-07:00ComputerWhizhttps://support.mozilla.org/zh-TW/questions/974270#answer-489846<p><strong>Try Firefox Safe Mode</strong> to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
</p><p><em>(If you're not using it, switch to the Default theme.)</em>
</p>
<ul><li> On Windows you can open Firefox 4.0+ in Safe Mode by holding the <strong>Shift</strong> key when you open the Firefox desktop or Start menu shortcut.
</li><li> On Mac you can open Firefox 4.0+ in Safe Mode by holding the <strong>option</strong> key while starting Firefox.
</li><li> On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
</li><li> Or open the Help menu and click on the <strong>Restart with Add-ons Disabled...</strong> menu item while Firefox is running.
</li></ul>
<p><img class="wiki-image frameless" src="https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/gallery/images/2013-07-08-18-32-01-a08d8d.png" alt="FirefoxSafeMode" width="520">
</p><p><em>Once you get the pop-up, just select "'Start in Safe Mode"</em>
<img class="wiki-image frameless" src="https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/gallery/images/2012-07-27-09-26-19-ee761a.png" alt="Safe Mode Fx 15 - Win" title="">
</p><p><em><strong>If the issue is not present in Firefox Safe Mode</strong></em>, your problem is probably caused by an extension, and you need to figure out which one. Please follow the <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> article for that.
</p><p><em>To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.</em>
</p><p>Please report back soon.
</p>