Can't use SwitchHosts

SwitchHosts does not work with the current version of Firefox. Is there another way I can accomplish the same thing without SwitchHosts?

I'm getting an error for SwitchHosts and when I try to open the Hosts Manager it is not opening. I need help! Thanks.

@carla327 Sorry for such long delay. The SwitchHosts addon is not supported by latest version of Firefox.
You can change the hosts file of your local system to add IP and domain name.