Please describe the problem. Give details.

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.

please get in contact with your relevant local authorities if you think there is wrongdoing by individual persons. posting about this here in a support forum for firefox is unfortunately offtopic and we won't be able to be of help with that. thank you!