The stage setting sounds a little too grim- JS debuggers (Venkman etc) and smartphones existed in 2005, and people haven't stopped using editors like vi or textmate to write code.
My memories of it are very different. console.log was not a thing (it requires a console, right?), attaching a debugger required visual studio, and the debugger was aweful.
I even wrote a blog post about it: http://notetodogself.blogspot.com/2008/08/debug-javascript-i...
And note that was 3 years after 2005!!! And we were still supporting ie6 full force just like everyone else.
Debugging ie6 in 2005 was very difficult.
Also I remember getting my first Android phone in 2008. iPhone was released in 2007. Before that time phones with big screens were not what you would call a smartphone.