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Check if a folder named Mozilla Firefox folder is located under Program Files (x86) folder. Step 2: Double-click on Program Files (x86) folder.
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The drive where Windows 10 is installed displays Windows logo on it for easy identification. Step 1: Open the drive where Windows 10 is installed. Method 5 of 5 Find if you are running 32 or 64-bit Firefox using File Explorer Step 4: Under Processes tab, the type (32-bit or 64-bit) appears next to Firefox’s name. Step 3: If you see the stripped-down version of Task Manager, click More details. To do so, you can either use Ctrl + Shift + Esc hotkey or right-click on an empty spot on the taskbar and then click Task Manager. Step 1: Run Mozilla Firefox, if not already running. Method 4 of 5 Use Task Manager to find if you are running 32 or 64-bit Firefox As you can see in the picture below, I am running x86 (32-bit) version of Firefox on my PC. The program name includes the type of Firefox. Step 1: Type Appwiz.cpl in Start/taskbar search field and then press Enter key to open Programs and Features window. Method 3 of 5 Use Control Panel to check if you are running 32 or 64-bit Firefox As you can see in the picture below, the type (32 or 64-bit) of Firefox appears next to Mozilla Firefox entry. If you are on Windows 10 Creators Update (14997 or above build), navigate to Apps > Apps & features after opening System. Method 2 of 5 Use Settings to check if you are running 32 or 64-bit Firefox Win64 圆4 will appear if you have installed Firefox 64-bit. Step 3: A WOW64 entry indicates that you are running 32-bit Firefox.
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