Not a FF issue you went to a site with malware and got malware installed. Now you need to take it to a shop to fix it.

^ignore the suggestion that it is indeed malware and you need to take it somewhere to get system looked at. ''pogisan [[#question-1231325|said]]'' <blockquote> While on the internet a window in Firefox popped up and stated I need to download "fireapi.download" It totally locked up my computer and even after rebooting it came up under Firefox. I had to use the task manager to remove 10 running Firefoxs? </blockquote> fireapi may not be malware depending on where it is from like for example https://www.unibrain.com/products/fireapi-1394a1394b-sdk/ https://www.unibrain.com/licensinginfo/ However since you use Windows you could try and scan your system. https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware