If you are not satisfied with the current Firefox version or it simply is not working right now, there are alternative browsers that you can use to browse the web. Grow and share your expertise with others. Answer questions and improve our knowledge base. Search Support Search. Home Firefox Download, install and migration Install an older version of Firefox. Warning: Firefox now includes downgrade protection to prevent corruption of user profile data. If you install an older version, you'll be prompted to create a new Firefox profile.
Mozilla Blog Learn about Mozilla and the issues that matter to us. Close Innovation menu Mozilla Hubs Gather in this interactive, online, multi-dimensional social space.
Firefox Developer Edition Get the Firefox browser built just for developers. Firefox Reality Explore the web with the Firefox browser for virtual reality. Common Voice Donate your voice so the future of the web can hear everyone. Download options and other languages.
Firefox Browser support. Latest Firefox features Picture-in-Picture Pop a video out of the browser window so you can stream and multitask. Choose your color Personalize your experience with new colorways. How Firefox compares to other browsers Get all the speed and tools with none of the invasions of privacy. Compare Firefox to: Chrome Edge Safari.
We block the ad trackers. You explore the internet faster. More About Mozilla. More Mozilla Innovation. Users on bit Windows who download Firefox can get our bit version by default. That means you get a more secure version of Firefox, one that also crashes a whole lot less. How much less? You can still manually install bit Firefox, if you choose.
Search Support Search. Learn More. Chosen solution You can install a portable ESR Firefox version to access websites that do not work with the current Firefox release. Follow OldVersion. Old Version. Add info. Mozilla Firefox 1. Mozilla Firefox 3. Mozilla Firefox 4.
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