Why is webroot flagging firefox and does it have imbedded viruses in it

Are you sure you're getting it from the Mozilla website?  Typically when we flag browser downloads it is because someone is getting it from a site that bundles malware around the browser.  What link are you using for your download?  This is the correct one:
https://www.mozilla.org/en-US/firefox/new/

Hello
Download:
ftp://ftp.mozilla.org/pub/firefox/releases/35.0/win32/en-US/Firefox%20Setup%2035.0.exe
(Firefox 35.0 is now available -  https://community.webroot.com/t5/Security-Industry-News/Mozilla-Firefox-35-0-released/m-p/181547#M11689)
 
This file is safe
Webroot scan log:
[g] d:downloadsfirefox setup 35.0.exe [MD5: DB11B0851F66418C3850D8B3FF3574EA] [Flags: 08001000.0]
G - Good

Hello and Welcome to the Webroot Community!
 
I like this link as we don't know the native language of members so they can download what they require: https://www.mozilla.org/en-US/firefox/all/
 
And @ I never use FTP to download as it's not as secure so it's best not to post them IMO.
 
Thanks,
 
Daniel 😉

Good point on the language - thanks for adding that @ !