WebIDE: Develop, deploy and debug Firefox OS apps.įirefox Developer Edition is free software made available under the Mozilla Public Licence for the Windows operating system from web browsers.Web Console: View and debug messages logged by the browser.Validation: Validate HTML, CSS and other web technologies.Style Editor: Create and edit CSS rules.Source Editor: Edit and debug HTML, CSS and JavaScript.Scratchpad: Test JavaScript code in an interactive environment.Responsive Design: Quickly build, test and preview responsive websites.Performance Tools: Analyze and optimize the performance of web content.Network Monitor: Monitor web requests and responses to detect performance issues.Memory Tool: Track and analyze memory usage in web pages.

JavaScript Debugger: Debug JavaScript code line-by-line.Developer Toolbar: Quickly access Firefox Developer Tools.DOM Inspector: Examine web page structure and layout.CSS Grid Layout: Create powerful and adaptive layouts with the enhanced Grid Inspector.Accessibility Inspector: Evaluate web pages for accessibility issues.Like the main branch of Firefox, this version also includes the main development tools like the Inspector, Console, Debugger, Style Editor, Performance tab, Memory, Network, Storage and Accessibility. These tools can be handle for testing web applications. In terms of tools, Developer Edition provides a WebIDE, Browser Console, Responsive Design Mode, Eyedropper, Scratchpad (for JavaScript debugging) and Service Workers.

The look and feel of Firefox Developer Edition is slightly different from the main release, but it's nothing to get too excited about it's mainly just the color scheme. Stepping aside from the main development branch of Firefox, Firefox Developer offers a number of features that are currently not present in Firefox, namely beta features and tools for web development. Some of these tools and features eventually do make their way into the main Mozilla Firefox web browser. If you need to run 32-bit Firefox or manually install 64-bit Firefox, you can simply download and re-run the Windows (32-bit or 64-bit) Firefox installer from the Firefox platforms and languages download page.An enhanced version of Firefox browser aimed at developers with tools, improved backend and debugging for HTML, JavaScript and CSS with a built-in style editor.įormerly known as Firefox Quantum, Firefox Developer Edition is a specialized web browser built especially for web developers. You can still manually install 64-bit Firefox, if you choose.

If you see “(32-bit)” and are running Firefox 56.0.1 or newer, then your computer may not meet the minimum memory requirement for 64-bit (3 GB RAM or more).

If you see “(32-bit)” and you are running Firefox 56.0 or older, updating to the latest Firefox version should automatically upgrade you to 64-bit.

Check your Firefox version (in the “About Firefox” window) and look for “(32-bit)” or “(64-bit)” after the version number: If you’re running 64-bit Windows ( here’s how to check), your Firefox may already be 64-bit. Linux and macOS users, fret not, you already enjoy a Firefox that’s optimized for 64-bit. Also, with the jump from 32 to 64 bits, a security feature called Address Space Layout Randomization (ASLR) works better to protect you from attackers. Here’s the key thing to know: 64-bit applications can access more memory and are less likely to crash than 32-bit applications. What’s the difference between 32-bit and 64-bit? How much less? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more. That means you get a more secure version of Firefox, one that also crashes a whole lot less. Users on 64-bit Windows who download Firefox can get our 64-bit version by default.

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