Did you know that Firefox has a feature called “prefetch” that caches pages that it thinks you are going to click on? This can slow down system performance. Here’s how to disable the Firefox prefetch setting.
1. Type about:config in the address bar and press ENTER.
2. Locate and double-click the entry for network.prefetch-next
3. Set it to false to disable this feature. Double-clicking on the setting will change it.
The prefetch setting in Firefox is now disabled.