Hi I think you do have a copy of Firefox on your computer, but it does appear to be an old version. I strongly recommend you update to make sure that you have the latest security and stability fixes as well as new features. You can read more about how to update [https://support.mozilla.org/en-US/kb/update-firefox-latest-version here]. You should be able to download a copy of Microsoft Excel from the Microsoft website, but I am not sure if they will still be able to provide a copy of 2007 as I understand that later versions have been produced. I recommend you contact Microsoft directly and they should be able to help you with this. Alternatively, you may wish to try LibreOffice, an open source equivalent that is compatible with the Microsoft offering and is available for free from [https://www.libreoffice.org/ here]. I hope this helps, but if not, please come back here and we can look into a different solution for you.