Accessibility drivers can cause firefox.exe to poll constantly, driving up heat.
Editing the registry is safe if you follow instructions exactly, but mistakes can break programs.
✅ Always back up the registry key before editing:
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.
For 90% of overheating problems, the registry is the wrong tool. You should first try:
Clear cache and remove extensions – A bloated cache or a malicious extension is a common cause of "hot" CPU.
Update graphics drivers – Outdated drivers force Firefox into software mode.
Check for malware – Some malware injects into Firefox, causing constant background activity.
Only if these fail—or if you’re in a managed environment where about:config is locked—should you pursue registry edits.
Instead of guessing Progid, do this:
| File Type | Typical Extension | Correct Program | Registry Path |
|-----------|------------------|----------------|----------------|
| FFXI Save | .dat (PlayOnline) | pol.exe | .dat → UserChoice → pol.dat |
| FFXIV Config | .cfg | ffxiv_dx11.exe | .cfg → UserChoice → FFXIV.cfg |
| FFVII Save | .ff7 | ff7_en.exe (with mod loader) | .ff7 → OpenWithList |
| FFXV Mod | .ffxvmod | ffxvmodtool.exe | .ffxvmod → UserChoice |
| FFVIII Remastered Save | .sav | FFVIII_Launcher.exe | .sav |
Let's take Final Fantasy XIV save data/config files as an example (.DAT files).
Replace .DAT with your problematic extension (.sav, .ffxvmod, .fmd, etc.).
Common scenarios:
Accessibility drivers can cause firefox.exe to poll constantly, driving up heat.
Editing the registry is safe if you follow instructions exactly, but mistakes can break programs.
✅ Always back up the registry key before editing:
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. file regedit ff hot
For 90% of overheating problems, the registry is the wrong tool. You should first try:
Clear cache and remove extensions – A bloated cache or a malicious extension is a common cause of "hot" CPU.
Update graphics drivers – Outdated drivers force Firefox into software mode. Accessibility drivers can cause firefox
Check for malware – Some malware injects into Firefox, causing constant background activity.
Only if these fail—or if you’re in a managed environment where about:config is locked—should you pursue registry edits.
Instead of guessing Progid, do this:
| File Type | Typical Extension | Correct Program | Registry Path |
|-----------|------------------|----------------|----------------|
| FFXI Save | .dat (PlayOnline) | pol.exe | .dat → UserChoice → pol.dat |
| FFXIV Config | .cfg | ffxiv_dx11.exe | .cfg → UserChoice → FFXIV.cfg |
| FFVII Save | .ff7 | ff7_en.exe (with mod loader) | .ff7 → OpenWithList |
| FFXV Mod | .ffxvmod | ffxvmodtool.exe | .ffxvmod → UserChoice |
| FFVIII Remastered Save | .sav | FFVIII_Launcher.exe | .sav |
Let's take Final Fantasy XIV save data/config files as an example (.DAT files).
Replace .DAT with your problematic extension (.sav, .ffxvmod, .fmd, etc.).
Common scenarios: