Bottom Line: It is 100% safe to clear the Firefox Profile cache. Clearing your browser cache will NOT delete your Firefox bookmarks, saved passwords, browsing history, or active extensions.
What are Firefox Profile Cache Folders?
Located at %LocalAppData%\Mozilla\Firefox\Profiles\[ProfileName]\cache2 on Windows (or ~/Library/Caches/Firefox/Profiles on macOS), these subfolders store cached data for Mozilla Firefox.
Firefox caches:
- HTTP Cache (
cache2): Images, stylesheets, and scripts from visited websites. startupCache: Pre-compiled Firefox UI JavaScript bytecode for fast startup.jumpListCache: Taskbar jumplist icons.
Over months of web browsing, cache2 continuously expands to 2 GB to 5 GB+.
Can You Delete Firefox Cache?
✅ Yes, it is completely safe to delete.
- Bookmarks & Passwords safe: Firefox stores your personal data in
places.sqliteandlogins.jsonin your roaming profile, completely separate from cache folders. - Fixes page errors: Clearing cache fixes website layout glitches and broken web pages.
How to Safely Clean Up Firefox Cache
Method 1: Using Firefox Built-in Clear Data Settings (Recommended)
- Open Mozilla Firefox.
- Press
Ctrl + Shift + Delete(orCmd + Shift + Deleteon Mac). - Set Time range to Everything.
- Check Cache (uncheck Cookies, Active Logins, and Browsing & Download History if you wish to stay logged in).
- Click Clear Now.
Related Guides
- Learn about deleting Browser Cache.
- How to clean up Chrome Code Cache.
- Check if you can clean Edge Web Cache.
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