You may have ad/mal-ware.
Further information can be found in this article;
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no
Run most or all of the listed free to use malware scanners. Each works differently.
If one program misses something, another may pick it up.
You may have ad/mal-ware.
Further information can be found in this article;
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no
Run most or all of the listed free to use malware scanners. Each works differently.
If one program misses something, another may pick it up.