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How to switch to Firefox ESR as a workaround for issues with the newest version of Firefox. The “Mozilla Firefox” app is available from the Microsoft Store for Windows 10 and Windows 11. Firefox stores your personal data and settings in a profile folder. Learn how to back up and restore this important information.

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This article links to older versions and provides some alternatives. This article explains how to download and install Firefox on macOS. This article describes how to download and install Firefox on Linux. This article describes how to download and install Firefox on Windows.

How the Firefox desktop launcher works

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. 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. Learn about update notifications on Windows that let you know when a brand-new Firefox version is available, even if Firefox is closed.

Choose your language or locale to browse Mozilla.org

Firefox automatically updates itself by default, but you can always do a manual update. Learn how to update Firefox on Windows, Mac, or Linux. Windows 10 may interrupt your Firefox install with a “Microsoft-verified apps” warning.

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. Import data from your Safari browser into Firefox. You must enable Full Disk Access on macOS version 10.14 (Mojave).

Firefox is safe to install, so choose “install anyway”. Learn how to install your favorite Mozilla products and keep them updated. Answer questions and improve our knowledge base. Firefox also implements “Safe Browsing,”98 a proprietary protocol99 from Google used to exchange data related with phishing and malware protection. Get Firefox mobile so your passwords, tabs and history — and the privacy and security you rely on — go with you wherever you go.

• 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.
• Firefox 4 was the first release to introduce significant HTML5 and CSS3 support.
• You cannot install Firefox from Mozilla or from the Microsoft Store on Windows in S mode.
• Learn how it works and how to disable or remove it.

If your bookmarks, passwords, preference settings and other data are missing, it may be available in another Firefox profile. On Windows, you can set Firefox to update in the background even when it isn’t running, so you always have the latest version. Downgrading to a previous Firefox version doesn’t solve most problems.

• Firefox version 115 ESR will be the last supported release for Windows 7, 8 and 8.1.
• Windows 10 may interrupt your Firefox install with a “Microsoft-verified apps” warning.
• You may see a warning that the installer could harm your device when attempting to download Firefox from another browser.
• Firefox stores your personal data and settings in a profile folder.

Firefox version 115 ESR will be the last supported release for Windows 7, 8 and 8.1. The custom setup option in the Firefox full, offline installer lets you choose the program folder location and shortcuts. Portions of this content are ©1998–2025 by individual mozilla.org contributors. Content available under a Creative Commons license. In June 2019, Mozilla unveiled a revised Firefox logo, which was officially implemented on version 70.

Firefox and Thunderbird install Mozilla Maintenance Service to allow seamless background updates. Learn how it works and how to disable or remove it. You may see a warning that the installer could harm your device when attempting to download Firefox from another browser. You cannot install Firefox from Mozilla or from the Microsoft Store on Windows in S mode. Learn what to do if you get a “Firefox is trying to install a new helper tool” message while updating Firefox on macOS.

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.238239 Unlike Firefox on Android, Firefox for iOS does not support browser add-ons. Firefox 4 was the first release to introduce significant HTML5 and CSS3 support. Fix the “installation incomplete/corrupt” error in Firefox on Windows by addressing common pin up casino promo code causes like corrupted files or hardware issues. A root certificate that expired March 14, 2025 can cause issues with add-ons, DRM media and essential features, unless you update Firefox. Firefox desktop should be installed on systems meeting minimum requirements for best performance.

Firefox is no longer supported on macOS 10.14 and below. Firefox is no longer supported on Windows 8.1 and below.