Mozilla Firefox vs Onion Browser
Mozilla Firefox
firefox.com
Onion Browser
onionbrowser.comSide by side
| Figure | Mozilla Firefox | Onion Browser |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | Yes |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | Yes | Yes |
| Android | Yes | — |
| Plans published | 1 | 2 |
| Spec score · Web browsers | 9.0 (#11) | 7.7 (#103) |
| Founded | 2004 | 2012 |
| Free plan | Yes | Yes |
| Open source | Yes | The app is free and open source, and anyone may contribute, audit, or inspect its code. |
| Supported platforms | both | mobile |
| Support | Mozilla provides Firefox help resources for desktop, enterprise, Android and iOS. | The project's GitHub help page documents common problems, suggests force-quitting and reopening for loading issues, and links to issue tracking for known bugs. |
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.
Onion Browser
Onion Browser has no write-up on Specifiction yet; its figures are above.