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Mozilla Firefox 46: What's New, What's Fixed, and How to Download

Mozilla Firefox 46 Download: A Guide for Windows Users

If you are looking for a fast, secure, and customizable web browser, you might want to consider downloading Mozilla Firefox 46. Firefox is one of the most popular browsers in the world, with millions of users who appreciate its open-source nature, privacy features, and extensive add-ons library. In this article, we will show you how to download and install Firefox 46 on your Windows device, as well as how to update it to the latest version. We will also compare Firefox with Google Chrome, another popular browser, to help you decide which one is better for your needs.

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Features of Firefox 46

Firefox 46 was released on April 26, 2016, and it introduced several improvements and fixes to the browser. Here are some of the main features of Firefox 46:

Improved security of the JavaScript JIT Compiler

The JavaScript Just In Time (JIT) Compiler is a component of Firefox that speeds up the execution of JavaScript code on web pages. However, it can also be exploited by malicious actors to run arbitrary code on your device. To prevent this, Firefox 46 improved the security of the JIT Compiler by adding a new technique called "JIT hardening". This technique makes it harder for attackers to bypass the existing security measures and execute malicious code.

GTK3 integration for GNU/Linux users

GTK3 is a toolkit that provides graphical user interface (GUI) elements for GNU/Linux applications. Firefox 46 integrated GTK3 into its browser, which means that it can now use the native look and feel of the GTK3 environment. This improves the compatibility and performance of Firefox on GNU/Linux systems, as well as the user experience.

WebRTC fixes to improve performance and stability

WebRTC is a technology that enables real-time communication (RTC) between web browsers, such as video calls, voice chats, and file sharing. Firefox supports WebRTC, but it also encountered some issues with it in previous versions. For example, some users reported high CPU usage, audio distortion, or video freezing when using WebRTC. Firefox 46 fixed these issues and improved the performance and stability of WebRTC.

Web Platform enhancements

Firefox 46 also added some new features to its web platform, which is the set of technologies that enable web developers to create web applications. Some of these features are:

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  • HKDF support for Web Crypto API: HKDF is a function that derives cryptographic keys from a secret value. The Web Crypto API is an interface that provides cryptographic operations for web applications. By supporting HKDF, Firefox allows web developers to use more secure and efficient key derivation methods.

  • Support for document.elementsFromPoint: This is a method that returns an array of elements that are located at a given point in the document. This can be useful for detecting overlaps, collisions , or interactions between elements.

  • Support for ES2016 draft specification: ES2016 is the latest version of the ECMAScript standard, which defines the core features of JavaScript. Firefox 46 supports some of the new features of ES2016, such as the exponentiation operator (), the Array.prototype.includes method, and the rest parameter syntax for object destructuring.

System Requirements for Firefox 46

Before you download and install Firefox 46, you should make sure that your device meets the minimum system requirements for running the browser. Here are the system requirements for Firefox 46 on Windows devices:

Windows Operating Systems

Firefox 46 supports the following Windows operating systems:

  • Windows XP SP2

  • Windows Server 2003 SP1

  • Windows Vista

  • Windows 7

  • Windows 8

  • Windows 10

Recommended Hardware

Firefox 46 recommends the following hardware specifications for optimal performance:


CPUPentium 4 or newer processor that supports SSE2

RAM512 MB of RAM / 2 GB of RAM for the 64-bit version

HDD200 MB of hard drive space

Screen Resolution800 x 600 pixels or higher

Internet ConnectionBroadband internet connection recommended

How to Download and Install Firefox 46

If your device meets the system requirements, you can proceed to download and install Firefox 46 on your Windows device. Here are the steps to follow:

Step 1: Go to the official Firefox website

The easiest way to download Firefox 46 is to go to the official Firefox website at [ This will take you to the download page where you can see the latest version of Firefox available for your device.

Step 2: Choose your language and platform

If you want to download Firefox 46 in a different language or for a different platform, you can click on the "Download options and other languages" link below the download button. This will take you to a page where you can see all the available languages and platforms for Firefox. You can select your preferred language from the drop-down menu and then click on the "Download" button next to the platform you want. For example, if you want to download Firefox 46 for Windows in Spanish, you can select "Español (de España)" from the menu and then click on "Download" under "Windows".

Step 3: Click on the download button

If you are happy with the default language and platform, you can simply click on the green "Download Now" button on the download page. This will start downloading a file called "Firefox Setup.exe" to your device. Depending on your internet speed and browser settings, you may need to confirm or choose a location for saving the file.

Step 4: Run the installer and follow the instructions

Once the download is complete, you can run the installer by double-clicking on the "Firefox Setup.exe" file. This will launch a wizard that will guide you through the installation process. You can choose between a standard or a custom installation, as well as change some settings such as your default browser, your homepage, and your search engine. You can also import your bookmarks, history, and passwords from another browser if you want. After you finish the installation, Firefox will open and you can start browsing with it.

How to Update Firefox to the Latest Version

If you already have Firefox installed on your device, you may want to update it to the latest version to enjoy new features, improvements, and security fixes. Here are the steps to update Firefox:

Step 1: Open Firefox and click on the menu button

The menu button is located at the top right corner of the browser window and it looks like three horizontal lines. Clicking on it will open a menu with various options.

Step 2: Click on Help and then About Firefox

Help is the last option in the menu and it has a question mark icon. Clicking on it will open a sub-menu with more options. Click on the "About Firefox" option to open a new window that shows the current version of Firefox and the update status.

Step 3: Check for updates and restart Firefox if needed

If there is a new version of Firefox available, you will see a message that says "Update to X.X.X" where X.X.X is the latest version number. You can click on the "Update to X.X.X" button to start downloading and installing the update. You may need to restart Firefox to complete the update process. If your Firefox is already up to date, you will see a message that says "Firefox is up to date". You can close the window and continue browsing.

Firefox vs Chrome: Which Browser is Better?

Firefox and Chrome are


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