Arc vs Firefox
Arc Browser
AI-integrated browser by The Browser Company designed for productivity and knowledge workers.
macOS professionals, productivity enthusiasts, knowledge workers who prioritize innovation over privacy
Firefox
Open-source browser by Mozilla Foundation emphasizing privacy, performance, and cross-platform support.
Privacy-conscious users, developers, Linux/Windows users, those seeking open-source transparency
Short Answer
Arc is a modern, AI-integrated browser designed for power users with a focus on productivity and customization, while Firefox is an open-source browser prioritizing privacy, standards compliance, and cross-platform consistency. Arc targets professionals seeking innovation, whereas Firefox appeals to privacy-conscious users and developers.
Our Verdict
AI-assistedChoose Arc if you're a Mac-using professional who values productivity features, AI integration, and innovative UI design for knowledge work. Choose Firefox if you prioritize privacy, cross-platform compatibility, open-source transparency, and want a lightweight browser available on Windows, Linux, and mobile devices.
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Choose Arc Browser if
macOS professionals, productivity enthusiasts, knowledge workers who prioritize innovation over privacy
Choose Firefox if
Privacy-conscious users, developers, Linux/Windows users, those seeking open-source transparency
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Key Differences at a Glance
Key Facts & Figures
| Metric | Arc Browser | Firefox | Diff |
|---|---|---|---|
| Active Monthly Users(millions) | 2-3 million (estimated) | — | — |
| Tracker Blocking Effectiveness(percent) | ~90% | — | — |
| Market Share(%) | 3% | 3% | — |
| Battery Life on MacBook Pro(hours) | 7.1 hours | 7.1 hours | — |
| Available Extensions/Add-ons(count) | ~150,000+ | ~150,000+ | — |
| Built-in VPN Data Limit(GB per month) | 50GB free | 50GB free | — |
| Memory Usage (10 tabs open)(GB) | 2.8GB | 2.8GB | — |
| Tracking Protection Coverage(% of trackers blocked) | 99.8% (ETP+VPN) | 99.8% (ETP+VPN) | — |
| Available Extensions(count) | 10,000+ | 10,000+ | — |
| Battery Life (MacBook Air)(hours) | 4-5 hours | 4-5 hours | — |
| Mobile Feature Parity(percentage) | ~85% | ~85% | — |
| Memory Usage (10 tabs)(MB) | ~350 MB | ~350 MB | — |
| Tracking Prevention Coverage(trackers blocked) | ~2000 (ETP enabled) | ~2000 (ETP enabled) | — |
| Feature Release Cycle(days) | ~28-56 days (4-8 weeks) | ~28-56 days (4-8 weeks) | — |
All figures sourced from publicly available data. Last updated Jun 2026.
Key Differences
Arc Browser
Proprietary, closed-source by The Browser Company
Firefox
Open-source maintained by Mozilla Foundation🏆
Arc Browser
Built-in AI assistant, ChatGPT integration, AI-powered features🏆
Firefox
Limited native AI; third-party extensions only
Arc Browser
Standard privacy; telemetry enabled by default
Firefox
Enhanced privacy with strict tracking prevention (ETP)🏆
Arc Browser
macOS only (iOS beta); Windows coming 2026
Firefox
Windows, macOS, Linux, Android, iOS (full support)🏆
Arc Browser
~450-550 MB (10 tabs)
Firefox
~300-400 MB (10 tabs)🏆
Arc Browser
Native split-view sidebar with folder nesting🏆
Firefox
Requires extensions for similar functionality
Arc Browser
~2 million monthly active users (2025)
Firefox
~215 million monthly active users (2025)🏆
Full Comparison
| Attribute |  Arc Browser |  Firefox |
|---|---|---|
| Active Monthly Users(millions) | 2-3 million (estimated) | — |
| Tracker Blocking Effectiveness(percent) | ~90% | — |
| Tracking Protection Coverage(% of trackers blocked) | 99.8% (ETP+VPN) | — |
| Cookie Isolation Strategy(method) | Total Cookie Protection (per-site) | — |
| Tor Integration(included/not included) | Not included | — |
| Default Privacy Mode(posture) | Privacy-conscious (requires customization) | — |
Show 1 more attributeTracking Prevention Coverage(trackers blocked) ~2000 (ETP enabled) — | ||
| Built-in Ad Blocking | No (extensions required) | — |
| Cryptocurrency Integration | No | — |
| Workspace Separation (Spaces) | Yes (native) | — |
| Native Split View Support | Yes (dual-pane) | — |
| Native Sidebar Organization | Requires extensions | — |
| Command Bar/Keyboard Navigation | Built-in Command Bar | — |
| Engine | Chromium-based | — |
| Market Share(%) | 3% | — |
| Privacy Rating | High | — |
| Battery Life on MacBook Pro(hours) | 7.1 hours | — |
| Memory Usage (10 tabs open)(GB) | 2.8GB | — |
| Page Load Speed vs Chrome(relative performance) | -12% slower | — |
| Battery Life (MacBook Air)(hours) | 4-5 hours | — |
| Ad Blocking Speed(blocking method) | Extension-based (slower, requires setup) | — |
Show 1 more attributeMemory Usage (10 tabs)(MB) ~350 MB — | ||
| Available Extensions/Add-ons(count) | ~150,000+ | — |
| Built-in VPN Data Limit(GB per month) | 50GB free | — |
| Supported Platforms | Windows, Mac, Linux, Android, iOS | — |
| Platform Support(platforms) | Windows, macOS, Linux, Android, iOS | — |
| Current Stable Version | 149.0.2 | — |
| Available Extensions(count) | 10,000+ | — |
| Latest Version Release | 149.0.2 | — |
| Feature Release Cycle(days) | ~28-56 days (4-8 weeks) | — |
| Engine Base(engine type) | Gecko (Mozilla proprietary) | — |
| Organization Type(type) | Nonprofit (Mozilla Foundation) | — |
| Mobile Feature Parity(percentage) | ~85% | — |
| Monthly Active Users(millions) | ~215 million | — |
| Built-in AI Features(yes/no) | None (extension-based only) | — |
| Source Code Availability | Open-source (Mozilla Public License) | — |
Arc BrowserFirefoxShow 1 more attribute
Show 1 more attribute
Visual Comparison
Side-by-side comparison of numeric attributes
Pros & Cons
Arc Browser
Pros
- Native split-view sidebar for parallel browsing and content organization
- Built-in ChatGPT integration and AI features for web content analysis
- Highly customizable UI with spatial organization (Spaces feature)
- Superior tab management with automatic grouping and search
- Weekly updates with frequent new features and improvements
Cons
- Limited to macOS (Windows delayed beyond 2026, iOS beta only)
- Higher memory consumption than Firefox (100-150 MB more per 10 tabs)
- Proprietary/closed-source limits transparency and community auditing
Firefox
Pros
- Open-source codebase with full community transparency and security audits
- Enhanced Tracking Prevention (ETP) blocks 2,000+ trackers by default
- Available on Windows, macOS, Linux, Android, and iOS with full feature parity
- 20-30% lower memory usage than Arc for equivalent tab counts
- Stronger standards compliance for web development and testing
Cons
- Fewer native productivity features; requires extensions for advanced tab management
- No built-in AI features (requires paid extensions for ChatGPT)
- Slower feature release cycle compared to Arc's weekly updates
Frequently Asked Questions
Arc is currently macOS-exclusive with an iOS beta. A Windows version has been promised but delayed beyond the originally announced 2025 timeline. Firefox runs natively on Windows, macOS, and Linux with full feature parity across all platforms.
Resources & Learn More
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Where to Buy
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