If you are one of those users who does not miss any of the continuous extensions that come out for Mozilla Firefox, especially if they are interesting, then you must download and install this Simple Mail Firefox.
Well, Simple Mail Firefox is an extension to add to your Mozilla Firefox browser that, once configured by the user, will automatically notify you when you receive an email. The most interesting thing is that it even allows you to write and send them from the browser itself, as well as to be able to delete the emails that you have already read or are not interested in.
That is, manage all your mail without having to leave the browser at any time or open another program.
You can free download Simple Mail Firefox 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.