Mozilla Firefox vs Slimjet
Mozilla Firefox
firefox.comSlimjet
slimjet.comSide by side
| Figure | Mozilla Firefox | Slimjet |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Web browsers | 9.0 (#11) | 8.5 (#39) |
| Browser engine | gecko | chromium |
| Built-in ad blocking | Yes | Yes |
| Cross-device sync | Yes | Yes |
| Extension support | own_store | chrome_store |
| Free plan | Yes | Yes |
| Supported platforms | both | desktop |
| Privacy | Firefox's privacy notice says browsing history, form data, temporary files and cookies are processed on the device unless the notice says otherwise. | Slimjet collects anonymous feature-usage statistics that can be turned off in settings; the maker says they are used internally and not shared with third parties. |
| Product | Firefox is a web browser that Mozilla describes as fast, private and useful across devices. | Slimjet is a web browser built on the open-source Chromium project and Blink engine. |
| Security | Firefox uses Google Safe Browsing to protect against malicious downloads and phishing attacks, and validates web pages and technical data with certificate authorities. | The maker says Slimjet provides phishing and malware protection and uses a sandboxed multiprocess architecture. |
| Support | Mozilla provides Firefox help resources for desktop, enterprise, Android and iOS. | The site links to an online manual, FAQ, online forum, and online feedback form. |
| Tracking protection | standard | advanced |
Plans
In their own words
Mozilla Firefox
Mozilla Firefox is a free, open-source web browser that uses the Gecko engine. It is available on Windows, macOS, Linux, iOS, Android, and as a browser extension, and its download page lists availability in more than 90 languages. Standard tracking protection and built-in ad blocking are included. Total Cookie Protection isolates cookies so they cannot follow users between websites, while Tab Groups organize open tabs by project, mood, or task. A Mozilla account can sync bookmarks, passwords, and open tabs across devices. Firefox also offers access to multiple AI chatbots in one place, letting users choose whether to use them. Thousands of free extensions are available through addons.mozilla.org. Mozilla’s privacy notice says browsing history, form data, temporary files, and cookies are processed on the device unless stated otherwise. Automated translation and PDF alt-text suggestions use downloaded language models locally; Firefox says those features do not send page content, PDFs, images, or tab URLs to Mozilla. Firefox is listed at free.