Get Firefox mobile so your passwords, tabs and history — and the privacy and security you rely on — go with you wherever you go. Firefox is no longer supported on macOS 10.14 and below. Firefox is no longer supported on Windows 8.1 and below.
Learn about Firefox browsers
- Firefox was created in 2004 by Mozilla as a faster, more private, and customizable alternative to browsers like Internet Explorer.
- Today, we are still not-for-profit, still not owned by any billionaires and still working to make the internet — and the time you spend on it — better.
- Portions of this content are ©1998–2025 by individual mozilla.org contributors.
- In April 2013, then-Mozilla CEO Gary Kovacs said that Firefox would not come to iOS if Apple required the use of the WebKit layout engine to do so.
- According to the Firefox Public Data report by Mozilla, the active monthly count of Desktop clients has decreased from around 310 million in 2017 to 200 million in 2023.346From October 2020, the desktop market share of Firefox started to decline in countries where it used to be the most popular.In Eritrea, it dropped from 50% in October 2020 to 9.32% in September 2021.
In April 2013, then-Mozilla CEO Gary Kovacs said that Firefox would not come to iOS if Apple required the use of the WebKit layout engine to do so. Apple’s policies require all iOS apps that browse the web to use the built-in WebKit rendering framework and WebKit JavaScript, so using Gecko is not possible.237238 Unlike Firefox on Android, Firefox for iOS does not support browser add-ons. Firefox implements many web standards, including HTML, XML, XHTML, MathML, SVG 1.1 (full),86 SVG 2 (partial),8788 CSS (with extensions),89 ECMAScript (JavaScript), DOM, XSLT, XPath, and APNG (Animated PNG) images with alpha transparency.90 Firefox also implements standards proposals created by the WHATWG such as client-side storage,9192 and the canvas element.93 These standards are implemented through the Gecko layout engine, and SpiderMonkey JavaScript engine.
Standards
Firefox 4 was the first release to introduce significant HTML5 and CSS3 support. According to the Firefox Public Data report by Mozilla, the active monthly count of Desktop clients has decreased from around 310 million in 2017 to 200 million in 2023.346From October 2020, the desktop market share of Firefox started to decline in countries where it used to be the most popular.In Eritrea, it dropped from 50% in October 2020 to 9.32% in September 2021. In June 2019, Mozilla unveiled a revised Firefox logo, which was officially implemented on version 70. The new logo is part of an effort to build a brand system around Firefox and its complementary apps and services, which are now being promoted as a suite under the Firefox brand. Firefox can have themes added to it, which users can create or download from third parties to change the appearance of the browser.8283 Firefox also provides dark, light, and system themes. Firefox was created in 2004 by Mozilla as a faster, more private, and customizable alternative to browsers like Internet Explorer.
- That’s why — with the help of dedicated volunteers around the world — we make Firefox available in more than 90 languages.
- Firefox 4 was the first release to introduce significant HTML5 and CSS3 support.
- Get Firefox mobile so your passwords, tabs and history — and the privacy and security you rely on — go with you wherever you go.
- Firefox also implements “Safe Browsing,”98 a proprietary protocol99 from Google used to exchange data related with phishing and malware protection.
- In June 2019, Mozilla unveiled a revised Firefox logo, which was officially implemented on version 70.
- The new logo is part of an effort to build a brand system around Firefox and its complementary apps and services, which are now being promoted as a suite under the Firefox brand.
- Firefox is no longer supported on macOS 10.14 and below.
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Today, we are still not-for-profit, still not owned by any billionaires and still working to make the internet — and the time you spend on it — better. Portions of this content are ©1998–2025 by individual mozilla.org contributors. Stay focused with extensions like Tomato Clock and Turn Off the Lights — they’re Recommended, which is like our gold star for having exceptional security and functionality. Everyone deserves access to the internet — your language should never be a barrier. That’s why — with the help of WreckBet login dedicated volunteers around the world — we make Firefox available in more than 90 languages. Firefox also implements “Safe Browsing,”98 a proprietary protocol99 from Google used to exchange data related with phishing and malware protection.