Mozilla Firefox is a free open-source browser whose development is overseen by the Mozilla Corporation. Firefox runs on Windows, OS X, Linux, and Android.
First released in November 2004, Firefox is completely customizable with themes, plug-ins, and add-ons. Firefox uses Gecko to render webpages, and implements both current and upcoming Web standards.
Firefox is the fast, lightweight, privacy-focused browser that works across all your devices. A better internetting experience.
Browse faster: Firefox uses less memory than Chrome, so your other programs can keep running at top speed.
Your favorite extensions: Add powerful functions, useful features and even a little fun to your Firefox browser.
Balanced memory: Firefox uses just enough memory to create a smooth experience so your computer stays responsive to other tasks.
More powerful Private Browsing: Private Browsing mode deletes cookie data and your browsing history every time you close it.
Ad tracker blocking: Firefox automatically blocks 2000+ ad trackers from following you around the internet.
Password manager: Firefox Lockwise lets you access all the passwords you’ve saved in Firefox — and it’s free.
Customize your browser: Give your browser the look you want with thousands of different themes.
Sync between devices: Make sure all your important stuff — internet searches, passwords, open tabs — appears where you need it on every device.
Better bookmarks: Use the bookmark star icon to stay organized and add custom names and folders quickly.
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