This episode deals with the annoying, and frustrating practice of disabling copy and paste on websites through the use of javascript.

For a detailed explanation of the why please read this excellent article by Nicholas Miller

Re-Enable Copy & Paste on Annoying Sites That Block It. In this article Nicholas explains that you can set dom.event.clipboardevents.enabled in Firefox to prevent this.

In Chrome, you are going to need to install extensions to get the same functionality. The following ones worked for me:

Allow Copy

Don't Fuck With Paste

https://www.troyhunt.com/the-cobra-effect-that-is-disabling/