Looks like Firefox Mobile’s Ghostery add-on is outdated and doesn’t have this feature.
EDIT: It looks like I was sort of wrong. The setting doesn’t seem to show up in the main app settings, but I went to a site that had a cookie consent form after installing Ghostery and Ghostery gave me a pop-up asking if I want to enable NeverConsent on this website and/or all websites. So it looks like it does work.
Looks like Firefox Mobile’s Ghostery add-on is outdated and doesn’t have this feature.
EDIT: It looks like I was sort of wrong. The setting doesn’t seem to show up in the main app settings, but I went to a site that had a cookie consent form after installing Ghostery and Ghostery gave me a pop-up asking if I want to enable NeverConsent on this website and/or all websites. So it looks like it does work.