Hello Unity Nijas!
I'm an experienced software developer (Java, C#, Web development etc) however I have no previous game development experience.  So please pardon my ignorance WRT the Unity platform.  

Never the less, I have a game idea and I'd like to try and build it using Unity.  Being that I don't know anything about unity, I'll probably be looking for people to work with who can help me learn the ropes.  Feel free DM me if you're interested. 

My first question is about WEBGL.  Is it possible to build a Unity game that works via a browser running on WEBGL without the need for a plugin?  If so, will it work on all major browser platforms (desktop, mobile, tablet etc)?  I don't want to have to build 3 different version of the app unless I have to.  Any advice here would be helpful.