Howdy, I sent the author of bloody vikings your way a while back. I'm here today because two extensions I regularly use are being detected by adwcleaner.
1. "ClassicThemeRestorer" https://addons.mozilla.org/en-US/firefox/addon/classicthemerestorer/versions/ (I am using the developer/beta edition.)
2. "SavedPasswordEditor" https://addons.mozilla.org/en-US/firefox/addon/saved-password-editor/
...