Firefox 140: The Latest in Speed, Customization, and Privacy
The newest version of Mozilla Firefox—Firefox 140—was released on June 24, 2025, and it’s packed with thoughtful updates. Whether you’re a power user, a casual browser, or a developer, this version has something worth trying out.
🔄 Vertical Tabs Get Smarter
Firefox continues to improve its vertical tab experience. In version 140, the pinned tabs sidebar is now resizable. This means you can drag the sidebar to reveal more or fewer pinned tabs—helping you stay organized and focus on what matters.
🧠 Tab Unloading for Better Performance
Running too many tabs at once? Firefox 140 introduces a new feature: Unload Tab. Simply right-click on one or more tabs and choose “Unload Tab” to free up memory and CPU. The tab stays in place, but the content is suspended until you reopen it.
🔎 Easier Custom Search Engines
Now you can add custom search engines directly from search fields on websites. Just right-click any site’s search bar and Firefox will let you add it. You can also manage them under Settings > Search.
🧹 Cleaner Toolbar, Less Clutter
Don’t want the puzzle-piece icon (Extensions button) cluttering your toolbar? Firefox now allows you to remove it completely, keeping your interface clean while still accessing extensions through the main menu.
💻 Developer Tools & Tech Upgrades
- Support for CSS Custom Highlight API
- Improved full-page translations
- Better support for the CookieStore API and pointerrawupdate event
These updates give developers more flexibility and precision when building for the modern web.
📱 Firefox for Android 140 Highlights
- Fingerprint/passcode protection for private tabs
- Select all support for bookmark management
This version helps keep your browsing more secure and manageable on mobile.
🧭 The Direction Firefox Is Heading
Firefox 140 is all about efficiency, customization, and privacy. With the retirement of Pocket, Mozilla is clearly streamlining the browser’s features to focus on core browsing performance and user control.
🚀 How to Update
To get Firefox 140:
- Click the ☰ menu in the top-right corner of Firefox
- Go to Help > About Firefox
- Firefox will automatically check for and install updates
- Restart Firefox when prompted
🎯 Final Thoughts
Whether you’re excited about faster performance, cleaner layouts, or new dev tools, Firefox 140 is a solid upgrade worth exploring. Don’t forget to check your extensions and search settings to take full advantage of these features!
JM Cunningham 