this sounds like a problem possibly caused by malware on your pc. please go to ''firefox > addons > extensions'' & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc). also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there and run a full scan of your system with the security software that you have in place and different other tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] & [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner]. [[Remove a toolbar that has taken over your Firefox search or home page]] [[Troubleshoot Firefox issues caused by malware]]

Assuming it is not that you have higher standards than search sites do in considering what is suitable then the problem is likely to be that you have malware on the computer. If children actually use the computer, consider taking some extra precautions. *Set up a separate OS account for children to use <br/>(I only have Windows7 links to hand, but as introductory background info they should suffice )<br/> http://windows.microsoft.com/en-us/windows7/create-a-user-account <br/>http://windows.microsoft.com/en-us/windows7/user-accounts-frequently-asked-questions *and read this article [[Block and unblock websites with parental controls]] ---------- Standard & applicable response about malware: Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of. You can try these free programs to scan for malware, which work with your existing antivirus software: * [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner] * [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware] * [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility] [http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one. Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article. Did this fix your problems? Please report back to us!