This has stopped working with me in Firefox v.56. I have used this whilst checking my webpages for many years and I hope the dev will update the code as it shows on my Addons as a Legacy addon, which means it will never work again with the new tech Firefox v.57 update. 260 Responses to “NoDoFollow – A Firefox Extension” James Hill Says: January 29th, 2012 at 5:01 pm. The last time I installed the plugin, it said it would last over many a Firefox version. It keeps that promise like a champ. It is helpful in lots of situations. It helps you to see where the links are on a page, and what kind of link they are.