Grammarly is a free (and paid) service that allows you do to automatically spell and grammar checks within your browser. https://www.grammarly.com/
For someone such as myself who does 'drive by posting' (time-consuming restraints from proofreading), it really is necessary. Surprisingly, our IT Staff even installed this for everyone at work.
For whatever reason, it only seems to work when I switch the editor to HTML. If you could figure out what is suppressing it when I use the normal editor, that would be very much appreciated and help expedite our adaptation of your new software on our company forums.