I have a similar issue. It blocks the ads but doesn't open them.
LibreWolf
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Unsure why it wouldn't work unless it's an about:config conflict.
Edit: by "no internet" do you mean you can't access any website?
Edit2: may want to check out here, granted it is not librewolf outright, may have some useful nuggets to try to help.
Yes I mean unable to open any website.
And if you disable it, it works fine? Edit: what os are you using, and how'd you install adnauseam?
I installed adnauseam via ff store. If I disable adnauseam librewolf is able to access websites. I use NixOS.
Have you tried opening it through terminal to see what errors it may give?