How do I get my RMB back?

I am finally updating from http://www.worldwidetelescope.org/scripts/wwtsdk.aspx to https://web.wwtassets.org/engine/7/wwtsdk.js and I am missing the ability to use the RMB to access the inspect functionality of the browser (firefox or chrome) as I can never remember the key press. Unfortunately it looks like this has gone away as RMB seems to be treated as LMB.

Is there some way to get this functionality back?

In such a situations i often use settings > Restore defaults

I’m sorry, but I don’t know where you find this ‘Restore defaults’ option.

It’s also not useful for me as I want this to hold whenever I (or another user) goes to the web site.