Accessing "Reference"

When I go to Help/References my browser (Edge)tries to open this webpage:

file:///C:/Program%20Files%20(x86)/Arduino/reference/www.arduino.cc/en/Reference/HomePage.html

It doesn't get anywhere. Isn't there a local copy? Why doesn't it open? What's the problem?

I'm using version 1.6.8 of the IDE.

That is the local copy. No idea why it does not open.

Maybe go to that directory (using windows explorer) and double click the file.

I had that problem at one point using Edge. I don't like Edge anyway, so I just installed Firefox.