How to Make Waterfox Faster and Lighter - Waterfox

Disable add-ons you don't actively use, clear your cache regularly, and adjust browser settings to make Waterfox faster and lighter on your system.

Reduce Memory Usage Fast

Open Waterfox and head to the menu (three horizontal lines, top right). Click Preferences > Privacy & Security. Scroll down to "Cookies and Site Data" and hit Clear Data. This dumps cached files eating up space.

Next, go to about:preferences#home in your address bar and disable any homepage shortcuts or sponsored content you don't need. Every widget takes RAM!

For real performance tuning, disable background tabs from consuming memory. Type about:config in the address bar, search for browser.tabs.drawInTitlebarLiveTheme, and set it to false. This cuts unnecessary rendering overhead.

Manage Extensions Strategically

Here's the thing — XUL extension support is one of Waterfox's standout features, but too many extensions tank speed. Go to Preferences > Extensions & Themes. Check which add-ons you actually use weekly. Anything dormant? Remove it.

Even lightweight extensions add background processes. Consider replacing heavy extensions with built-in Waterfox features where possible.

Hardware Acceleration & Cleanup

Navigate to Preferences > General > Performance. Enable "Use recommended performance settings" to let Waterfox optimize itself. If that's already on, check "Use hardware acceleration" — it's a speed boost for graphics rendering on Windows.

Finally, schedule weekly cleanups. Delete your browsing history (Ctrl+H > Clear Recent History) and temporary files monthly. Set Waterfox to clear cache on exit: Preferences > Privacy & Security > Cookies and Site Data > check "Delete cookies and site data when Waterfox is closed".

Bottom Line

These tweaks combine to shave megabytes and boost responsiveness noticeably. Start with disabling unused extensions — that delivers the quickest win for making Waterfox faster and lighter without sacrificing core functionality.