You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.

Bookmark and use this; Download the Mozilla Search Reset {web link} This add-on is very simple: on installation, it backs up and then resets your search preferences and home page to their default values, and then uninstalls itself. This affects the search bar, URL bar searches, and the home page.

Hi, have a look here How to set the home page and click on Restore to Default.

If that doesn't fix it, you can try these free programs to scan for malware, which work with your existing antivirus software:

• Microsoft Safety Scanner
• MalwareBytes' Anti-Malware
• Anti-Rootkit Utility - TDSSKiller
• AdwCleaner (for more info, see this alternate AdwCleaner download page)
• Hitman Pro
• ESET Online Scanner

Note that not all removal programs will detect all malware, so you may need to run several or all of them.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

After removal, you may need to reset your home page (Restore to Default), as above.

Did this fix your problems? Please report back to us. Thank you!

Thanks gents, especially to Scribe, your suggestion worked a treat.

Jim

Hi   !
Glad to know your problem is solved   !
Would you be a dear and mark   Scribe's   answer as   Chosen Solution,   so others will know and might benefit from it   ?
Thanks   !