Arc vs Firefox: Privacy Comparison
Here we put Arc head-to-head with Firefox across the six privacy factors that matter most: their data collection practices, encryption implementation, third-party data sharing, user privacy controls, transparency, and historical track record. While both products address similar requirements, the philosophies they bring to protecting users diverge sharply. Our assessment finds that Firefox provides a noticeably better overall privacy experience, although neither service is without trade-offs that deserve a careful, detailed look.
Who Wins, and Why
The most useful starting point is the overall tally and the single dimension that decided it. Across the six privacy dimensions we score, Firefox finishes ahead of Arc, 48/60 to 36/60. That total reflects a side-by-side review in which one service is consistently the more privacy-respecting choice, even though both cover the same functional ground.
Most of the distance between these services opens up on Data Collection: Arc 6/10 versus Firefox 8/10. The tightest race is Data Collection, separated by just 2 points (Arc 6/10, Firefox 8/10). Everything below justifies these totals dimension by dimension.
Data Collection Practices
The starting point for judging privacy is always how data is collected. The amount of user data a service captures, keeps, and works with is the single biggest factor behind its privacy exposure. Firefox shows more discipline on this front, collecting nothing beyond the bare minimum needed for the service to run. The competing option reaches for a much wider set of data, including behavioral patterns, device identifiers, and usage analytics that stretch beyond the essentials. In this category we rated Arc 6/10 and Firefox 8/10. The gap comes down to more than raw volume -- it is about the intent behind each piece of data and whether collecting it was ever justified.
Encryption Standards
Encryption guards user data as it moves and while it sits at rest, and how well it is built differs enormously from one service to the next. Firefox puts tougher encryption in place, with sturdier protocols shielding data in transit and stronger safeguards for what is stored. The two implementations part ways on coverage (which data actually gets encrypted), on strength (which algorithms and key lengths back it up), and on whether end-to-end encryption is in play (which keeps even the provider from reading user content). For encryption, Arc scored 7/10 while Firefox scored 9/10.
Who Else Gets Your Data
How services share data with third parties is a critical privacy dimension. This includes sharing with advertising networks, analytics providers, business partners, and in response to government requests. Firefox maintains more restrictive policies regarding third-party data access. The data sharing practices affect not just privacy but also the security of user information, as each additional party with access represents a potential breach vector. Scores: Arc 8/10, Firefox 10/10.
What You Can Manage Yourself
Individuals only hold real power over their data when a service's privacy controls are available and genuinely effective. The relevant tools include the option to opt out of data collection, ways to download and erase data, granular permission settings, and how readily users can exercise the rights afforded them by applicable privacy regulations. Firefox offers more complete and approachable privacy controls. Scores: Arc 4/10, Firefox 6/10.
Transparency
Transparency comes down to how plainly a service explains what it does with data. It shows up in how readable the privacy policy is, whether transparency reports are published, how quickly privacy questions get answered, and whether policy changes are communicated up front. Firefox comes across as the more transparent of the two overall. Plain, easy-to-find privacy communication is the bedrock of informed consent and trust. Scores: Arc 5/10, Firefox 7/10.
What Their History Reveals
A service's history of privacy incidents, regulatory actions, and responses to vulnerabilities provides important context. Firefox has a stronger historical record on privacy, with fewer incidents and more responsible handling of the issues that have arisen. Past behavior is often the best predictor of future privacy practices. Scores: Arc 6/10, Firefox 8/10.
Our Bottom-Line Call
Adding everything up, our full analysis lands Arc at 36/60 and Firefox at 48/60. For privacy, the overall winner is Firefox. The two cover much the same functional ground, but the winner takes a more privacy-respecting stance across the dimensions that count for the most. Even so, no service is flawless, and whichever option you pick, you should always tune its privacy settings deliberately. We suggest pairing your choice with extra privacy tools, a VPN, DNS-level ad blocker, and privacy-focused browser, so you end up with a well-rounded privacy posture. And if your threat model demands the very highest level of privacy, it is worth asking whether an even more privacy-focused alternative exists in this category beyond the two compared here.