Common scenarios:
| Purpose | Registry Path |
|---------|----------------|
| Policies (enterprise) | HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox |
| User preferences (legacy/override) | HKEY_CURRENT_USER\Software\Mozilla\Firefox |
| Installation info | HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox |
| Default browser settings | HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\https\UserChoice |
This is a critical point of confusion. Unlike many legacy Windows applications (or Internet Explorer/Edge), Mozilla Firefox is a portable-friendly browser. It primarily stores its configuration in a profile folder on your hard drive (using prefs.js), not in the Windows Registry. file regedit ff hot
However, Firefox does write some keys to the Registry for integration purposes. These include:
So when you file regedit ff hot, you won’t find a direct "Temperature" slider. Instead, you will find keys that can indirectly affect performance, such as hardware acceleration policies, multi-process limitations, or background task settings. Common scenarios:
The Mozilla Maintenance Service can occasionally spin the CPU after updates.
Effect: Prevents the service from running, reducing background CPU usage. (Note: You must manually update Firefox later.) | Purpose | Registry Path | |---------|----------------| |
If multiple FF files are broken, use Command Prompt as Administrator:
assoc .dat=FFXIVSaveFile
ftype FFXIVSaveFile="C:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\boot\ffxivboot.exe" "%1"
Replace paths and extension names as needed.