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Do I need a 64-bit version of Firefox?
Is Firefox 32-bit or 64-bit?
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Users on 64-bit Windows who download Firefox can get our 64-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? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more.
- Windows
Firefox is no longer supported on Windows 8.1 and below....
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- Windows
Firefox is no longer supported on Windows 8.1 and below. Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR 64-bit
Aug 27, 2021 · To see if the 32-bit or 64-bit version of Firefox is installed, locate Mozilla Firefox in the list of programs. The program name will be followed by the the bit version and language, in parentheses. If the program name contains x86, the 32-bit version of Firefox is installed.
- Windows
- Mac
- GNU/Linux
Operating Systems
1. Windows 7 2. Windows 8 3. Windows 10 4. Windows 11
Recommended Hardware
1. Pentium 4 or newer processor that supports SSE2 2. 512MB of RAM / 2GB of RAM for the 64-bit version 3. 200MB of hard drive space
Operating Systems
1. macOS 10.12 2. macOS 10.13 3. macOS 10.14 4. macOS 10.15 5. macOS 11 6. macOS 12
Recommended Hardware
1. Mac computer with an Intel x86 or Apple silicon processor 2. 512 MB of RAM 3. 200 MB hard drive space
Software Requirements
Please note that GNU/Linux distributors may provide packages for your distribution which have different requirements. 1. Firefox will not run at all without the following libraries or packages: 1.1. glibc 2.17 or higher 1.2. GTK+ 3.14 or higher 1.3. libstdc++ 4.8.1 or higher 1.4. X.Org 1.0 or higher (1.7 or higher is recommended) 2. For optimal functionality, we recommend the following libraries or packages: 2.1. DBus 1.0 or higher 2.2. GNOME 2.16 or higher 2.3. libxtst 1.2.3 or higher 2.4. N...
Oct 4, 2019 · Mozilla now offers a 64-bit version of Firefox browser for windows. Most platforms will use 64-bit web browsers when the user is running a 64-bit operating system. Two of the benefits the 64-bit browser offers are faster speed and more security thanks to the many employed security features.
Jan 27, 2024 · If you have a 64-bit version, it will be explicitly mentioned next to the version number. If it's a 32-bit version, it will not be specified, indicating that it's a 32-bit application. By following these simple steps, you can easily determine whether your Firefox browser is 32-bit or 64-bit.
Jan 8, 2016 · From the User Agent line under Application Basics, you can see if this is the 32-bit version or 64-bit version running. The 32-bit Firefox running on a 64-bit Windows 8.1 shows WOW64 in the User Agent. The 64-bit Firefox running on a 64-bit Windows 8.1 shows Win64; x64.