Is there a way to block all pinterest results?

Is there a way to block all pinterest results from search engines? This doesn't seem to work: https://addons.mozilla.org/en-US/firefox/addon/unpinterested/.

This one doesn't block results in image search: https://addons.mozilla.org/en-US/firefox/addon/hohser/

Simply using "-site:pinterest.com" isn't great, because there are a bunch of pinterest domains: pinterest.com.mx, pinterest.es, etc. Typing them all in every time is a hassle.