What was the URL you used ? Why would you donate on a site that is in French ? Please report it by sending email to the address security@mozilla.org Official Site : *https://donate.mozilla.org/en-US/ Please use more than 1 scanner as each uses diff tech : *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware Save your Report and google each before deleting anything as do not want to delete something you need, If need help : *https://forums.malwarebytes.com/topic/9573-im-infected-what-do-i-do-now/ Post in only 1 forum, then wait. Please let us know if this solved your issue or if need further assistance.

Is there a language code in the link like you see at this forum? You can use websites like these to see how your location is reported via a reverse DNS look up of your IP: *http://whatismyipaddress.com/