Mozilla Releases First Beta of Firefox 4 - MacRumors
Skip to Content

Mozilla Releases First Beta of Firefox 4

115112 firefox 4 beta 1

Mozilla yesterday announced the release of Firefox 4 Beta 1 for Windows, Mac, and Linux. Not all of the changes scheduled for Firefox 4 are available on Mac and Linux yet, however, as major visual changes including the move of tabs to the top of the window (a feature tested and discarded by Apple in a Safari 4 public beta last year) and implementation of the Firefox button for quick access to commonly-used actions are Windows-only for the time being.

There is a lot more to this beta than a facelift on Windows, including:

- New Add-Ons Manager: gives you more space to manage your Add-Ons, Themes and Plugins. Customizing your browser has never been easier!
- HD Video: Watch hardware-accelerated, super-smooth, HD-quality HTML5 video on YouTube using the new WebM format.
- Privacy improvements: Mozilla always puts privacy first, and this latest beta fixes flaws in some Web standards that could expose your browser history.
- Crash Protection: Experience uninterrupted browsing (now available on all platforms) - when a plugin crashes or freezes, you can resume browsing by simply refreshing the page.
- Performance: We know that performance is important. In this version, we focused on improving responsiveness at start-up and during page loads. This is just the beginning for performance improvements in Firefox 4.

Firefox 4 also includes a number of under-the-hood enhancements to assist web developers with their projects. Finally, the new beta integrates a new Feedback Add-On that allows users to quickly send input back to Mozilla and to anonymously participate in Mozilla studies of web usage if they so choose.

Popular Stories

Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro Launching Later This Year With These 10 New Features

Tuesday May 26, 2026 6:32 am PDT by
While the iPhone 18 Pro and iPhone 18 Pro Max are not launching until September, there are already plenty of rumors about the devices. It was initially reported that the iPhone 18 Pro models would have fully under-screen Face ID, with only a front camera visible in the top-left corner of the screen. However, the latest rumors indicate that only one Face ID component will be moved under the...
apple wallet drivers license feature iPhone 15 pro

Apple Just Expanded iPhone Driver's License Feature to Arkansas

Wednesday May 27, 2026 9:41 am PDT by
In select U.S. states, residents can add their driver's license or state ID to the Apple Wallet app on the iPhone and Apple Watch, and then use it to display proof of identity or age at select airports and businesses, and in select apps. Starting today, the feature is available in Arkansas, which is the 14th state to offer it. However, it may take some time to roll out to all users. To...
Apple Watch Blood Glucose Monitoring Feature 2

Apple Watch for Diabetes: The Latest on Apple's Plans for Non-Invasive Blood Sugar Monitoring

Tuesday May 26, 2026 9:30 am PDT by
For many years now, it has been rumored that the Apple Watch will eventually gain non-invasive blood sugar monitoring capabilities, which would enable millions of people with diabetes to track their blood glucose levels without needing to prick their skin with a needle or wear a dedicated continuous glucose monitor. According to Bloomberg's Mark Gurman, Apple recently shifted oversight of...