palemoon.exe

Pale Moon Web Browser

Application ProcessSafeWeb Browser

CPU Usage

2-15%

Memory

120-350 MB

Location

C:\Program Files\Pale Moon

Publisher

The Pale Moon Project

Quick Answer

palemoon.exe is safe. Pale Moon is an open-source Firefox-derived browser that uses multiple processes for tabs, add-ons, and internal functions to improve security and stability.

Is it a Virus?

✔ NO - Safe

Must be in C:\Program Files\Pale Moon\palemoon.exe or C:\Program Files (x86)\Pale Moon\palemoon.exe

Warning

Many processes normal

Each tab + extension = separate process

Can I Disable?

✔ YES

Close tabs to reduce usage; Palemoon can be closed and not run in background

What is palemoon.exe?

palemoon.exe is the executable for Pale Moon, a lightweight, open-source web browser derived from Firefox. It emphasizes efficiency, privacy, and a flexible user interface, using multiple processes to isolate tabs, add-ons, and UI tasks for stable performance on Windows.

This browser uses a multi-process architecture to improve responsiveness and security. Pale Moon retains familiar Firefox-era features while modernizing core components and standards support, delivering a lean, fast experience on older hardware without sacrificing security updates.

Quick Fact: Pale Moon preserves legacy Firefox-era features and extension support while focusing on a lighter footprint and ongoing security updates.

Types of Pale Moon Processes

Browser Process: Main Pale Moon window and user interface (1 instance)
Renderer Process: Gecko-based rendering for each tab and iframe
GPU Process: Hardware acceleration and graphics rendering
Extension Process: Each Pale Moon extension may run in its own process
Plugin Process: For legacy plugins and content that requires NPAPI support
Utility Process: Background tasks and network services

Is palemoon.exe Safe?

Yes, palemoon.exe is safe when it's the legitimate file from the Pale Moon Project downloaded from official sources.

Is palemoon.exe a Virus or Malware?

The real palemoon.exe is not a virus. However, malware can disguise itself with similar names to trick users.

How to Tell if palemoon.exe is Legitimate or Malware

File Location:: Must be in C:\Program Files\Pale Moon\palemoon.exe or C:\Program Files (x86)\Pale Moon\palemoon.exe. Any palemoon.exe elsewhere is suspicious.
Digital Signature:: Right-click palemoon.exe → Properties → Digital Signatures → Should show signer "The Pale Moon Project" or "Moonchild Productions".
Resource Usage:: Normal usage is 2-15% CPU per tab, 120-350 MB total memory. Extremely high usage when the browser is closed is suspicious.
Behavior:: Palemoon.exe should only run when Pale Moon is active. Multiple background instances with no browser window open can indicate malware.

Red Flags: If palemoon.exe is located in unusual folders (like Temp, AppData\Roaming, or System32), runs when Pale Moon isn't open, has no digital signature, or uses excessive resources constantly, scan your system with antivirus software immediately. Beware of similarly-named files like "palemoon64.exe" or "palemoon32.exe" from untrusted sources.

Why Is palemoon.exe Running on My PC?

palemoon.exe runs when you open Pale Moon or when Pale Moon is set to run in the background, enabling quick startup and ongoing tasks such as updates and session restoration.

Reasons it's running:

Active Browser Use: You are browsing with Pale Moon — each open tab can spawn separate rendering processes to improve stability.
Background Extensions: Extensions and web apps may run in background to provide notifications or perform tasks when Pale Moon is not visible.
Startup Program: Pale Moon may be configured to launch at Windows startup for quick access.
Automatic Updates: Pale Moon checks for updates automatically and may run update-related processes in the background.
Session/Crash Recovery: Palemoon keeps a session and crash-recovery process active to restore tabs after a crash or restart.

Can I Disable or Remove palemoon.exe?

Yes, you can disable palemoon.exe. It's safe to close Pale Moon when not in use, and you can uninstall it completely if you prefer a different browser.

How to Stop palemoon.exe

Close Tabs or Browser: Close Pale Moon windows or individual tabs to reduce resource usage.
End Task: Open Windows Task Manager (Ctrl+Shift+Esc), locate palemoon.exe, right-click → End Task
Prevent Startup: Task Manager → Startup tab → Disable Pale Moon
Stop Background Apps: In Pale Moon, check Preferences/Options related to background tasks and disable automatic background activity if available

How to Uninstall Pale Moon

✔ Windows Settings → Apps → Apps & Features → Pale Moon → Uninstall
✔ Control Panel → Programs → Uninstall a program → Pale Moon → Uninstall
✔ If you plan to switch browsers: consider Firefox, Chrome, Edge, Brave, or Opera

Common Problems: High CPU or Memory Usage

If palemoon.exe is consuming excessive resources:

Common Causes & Solutions

Too Many Tabs Open: Each tab can use significant memory. Close unused tabs or use tab management approaches within Pale Moon.
Resource-Heavy Extensions: Disable unnecessary extensions (Menu → Add-ons) and remove or update problematic ones.
Legacy Plugins or NPAPI Content: Disable or update plugins; prefer built-in modern content rendering when possible.
Outdated Pale Moon Version: Update Pale Moon to the latest build (Help → About Pale Moon).
Hardware Acceleration Issues: Try turning off hardware acceleration: Preferences → General → System → Uncheck 'Use hardware acceleration when available'.
Profile or Cache Corruption: Create a new profile or clear cache: Menu → Help → Troubleshooting Information, then clear data and consider a fresh profile.

Quick Fixes:
1. Quick Fixes:
2. 1. Open Windows Task Manager to identify palemoon.exe processes and end misbehaving ones
3. Close unused tabs or the entire Pale Moon window
4. Clear browsing data: Ctrl+Shift+Delete
5. Disable unnecessary extensions in Menu → Add-ons
6. Update Pale Moon to the latest version

Frequently Asked Questions

Is palemoon.exe a virus?

No, the legitimate palemoon.exe from the Pale Moon Project is not a virus. Verify the file is located at C:\Program Files\Pale Moon\palemoon.exe or C:\Program Files (x86)\Pale Moon\palemoon.exe and is digitally signed by The Pale Moon Project.

Why is palemoon.exe using so much CPU?

High CPU can occur from many tabs, heavy extensions, or problematic content. Use Windows Task Manager to identify palemoon.exe processes, close resource-hungry tabs, disable extensions, and update Pale Moon.

Can I delete palemoon.exe?

Yes, you can uninstall Pale Moon via Windows Settings → Apps or Control Panel. Your bookmarks and data can be preserved if you sign in to a profile, but you will lose local data if not backed up.

Can I disable palemoon.exe?

Yes, you can close Pale Moon or disable startup, and stop background tasks via Task Manager. You can also adjust preferences to minimize background activity.

Why is Pale Moon running at startup?

Pale Moon may be configured to launch at Windows startup for quick access. Disable it in Task Manager → Startup, or adjust Pale Moon's own settings to prevent automatic startup.

Why are there multiple palemoon.exe processes?

Pale Moon uses a multi-process architecture to improve stability and security, with separate processes for the browser UI, tabs, and extensions. This is expected behavior.