> Using Chrome Galvanizer, you can protect yourself from attacks like this by specifying specific sites that one or all of your extensions can no longer access. For the MEGA case, if users had created a policy restricting access for the MEGA extension to access amazon.com, live.com, github.com, google.com, myetherwallet.com, mymonero.com, and idex.market then they'd be protected from the attack.
You might as well turn off the internet for some.