Các câu trả lời gần đây cho How do you keep images from saving as "unknown.ext"?https://support.mozilla.org/vi/questions/10421542015-01-20T06:41:22-08:00Please uninstall older versions of plugins in order to avoid security issues:
Shockwave Flash 16.0 2015-01-20T06:41:22-08:00rmcguiganhttps://support.mozilla.org/vi/questions/1042154#answer-680002<p>Please uninstall older versions of plugins in order to avoid security issues:
</p><pre>Shockwave Flash 16.0 r0
</pre>
<p>Shockwave Flash 9.0 r45
</p><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/viruses/disinfection/5350" rel="nofollow">Anti-Rootkit Utility - TDSSKiller</a>
</li><li> <a href="http://general-changelog-team.fr/en/downloads/viewdownload/20-outils-de-xplode/2-adwcleaner" rel="nofollow">AdwCleaner</a> (for more info, see this <a href="http://www.bleepingcomputer.com/download/adwcleaner/" rel="nofollow">alternate AdwCleaner download page</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>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 to us!
</p>