I don’t think your giving people much credit. Anyone on here who can bind their VPN to their torrent client can easily handle this.
I mean the filter list github literally provides instruction. So does ublock, so does pretty much any DNS filtering service.
This isn’t rocket science. All it takes is like 2% effort.
I am not an expert so I would highly recommend looking into more credible sources but my guess would be, since this is most likely not a very popular add-on, any browser with it would stand out considerably more relative to not having it.
Typically its common for browsers that want to reduce fingerprinting (tor, mullvad etc) recommend not installing new addons as then you stand out from crowd.
I’d say, since there are so many alternative ways to get this filter list, even if its a marginal increase in fingerprinting, its not worth installing it as an add-on.