Short answer: if all you want is automatic cookie rejection, get Consent-O-Matic. It's older, better tested, and runs on every major browser. If you also want tracker blocking, email tracking protection, and a Terms of Service scanner without installing three more extensions, that's where GetPawsOff comes in.
Here's the actual breakdown, not a sales pitch for either one.
What they have in common
Both are rule-based. Neither one uses some mystery AI to "detect" a banner, they both work off a maintained set of rules for how specific consent management platforms structure their popups (think Sourcepoint, OneTrust, Didomi, Quantcast, UserCentrics, and a long tail of smaller ones), and both dig into shadow DOM and iframes, because that's exactly where banners hide their reject buttons to make automation harder. Both are free. Both only ever click reject or decline, never accept, on your behalf.
Where Consent-O-Matic is ahead
It's older, more proven, and it runs on Firefox and Safari as well as Chrome. Its rule set covers over 200 named consent platforms, its GitHub sits at a few thousand stars with a couple hundred forks, and it shipped a release as recently as mid-2025. This is an actively maintained project, not an abandoned script. If cross-browser support or that track record matters to you, pick Consent-O-Matic. GetPawsOff is Chrome-only and much newer, plain and simple.
Where GetPawsOff pulls ahead
Consent-O-Matic does one job, and does it well. GetPawsOff bundles cookie-banner rejection with a network-level tracker blocklist (EasyPrivacy), a webmail tracking-pixel blocker, and a Terms of Service scanner that flags things like forced arbitration clauses or "we can sell your data to anyone we want" language before you agree to it. Some people prefer small, single-purpose tools, each one easy to audit on its own. Others would rather have one extension handling banners, trackers, and ToS scanning together. That second group is who GetPawsOff is built for.
Network behavior differs a little too. Consent-O-Matic checks in for rule updates and, if you opt in, reports back when its automation fails on a site. Fair enough, it's disclosed and it's optional. GetPawsOff goes further: one network call, period, a signed fetch for a rules update that's verified against a pinned key before it's ever used, and falls back to the bundled rules if that check fails. Neither extension is shipping your browsing history anywhere, they just get there differently.
Maturity is the real gap, and we're not going to pretend otherwise. Consent-O-Matic has years of real-world mileage. GetPawsOff just shipped version 0.1.0. It's tested against the common consent platforms, not against every banner on the internet yet, and our own README says so directly. Early and improving beats early and oversold.
Bottom line
Want the most proven, cross-browser tool and nothing more? Consent-O-Matic. Want banner rejection, tracker blocking, and a ToS scanner in one local-only extension, and you don't mind being an early user? GetPawsOff. Or just run both for a month and keep whichever one earns its keep.