Iridium Browser vs Mozilla Firefox
Iridium Browser
iridiumbrowser.org
Mozilla Firefox
firefox.comSide by side
| Figure | Iridium Browser | Mozilla Firefox |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| Plans published | 0 | 1 |
| Spec score · Web browsers | 6.8 (#150) | 9.0 (#11) |
| Extensions | Some extensions may not work because of Iridium Browser's privacy and security settings, and the project says it does not test extensions. | Firefox extensions add browser features and tools, with thousands of free extensions available through addons.mozilla.org. |
| Privacy | It prevents automatic transmission of partial queries, keywords, and metrics to central services unless the user approves. | Firefox's privacy notice says browsing history, form data, temporary files and cookies are processed on the device unless the notice says otherwise. |
| Security | The browser says it applies strict security enhancements while aiming to preserve compatibility. | Firefox uses Google Safe Browsing to protect against malicious downloads and phishing attacks, and validates web pages and technical data with certificate authorities. |
| Support | The site directs users to its GitLab bug tracker to report issues and ask questions. | Mozilla provides Firefox help resources for desktop, enterprise, Android and iOS. |
Plans
In their own words
Iridium Browser
Iridium Browser has no write-up on Specifiction yet; its figures are above.
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.