Browser.cache.memory.capacity Today

The browser.cache.memory.capacity setting!

To adjust this setting, you must navigate to Firefox’s internal configuration page: Browser.cache.memory.capacity

• browser.cache.disk.capacity: Controls the disk cache size (in KB). Default is often 250 MB to 1 GB.
• browser.cache.disk.enable: Boolean to turn disk caching on/off. (Turning disk off and relying solely on memory is useful for private browsing modes with extra RAM).
• browser.sessionhistory.max_entries: Controls how many pages are stored for back/forward navigation (often memory-backed).
• network.http.max-connections: While not a cache setting, it affects how quickly you fill the cache.

Caution

Step 1: Open about:config

Open a new Firefox tab and type exactly: about:config into the address bar. Press Enter. The browser

In the early days of the web, dial-up speeds were the bottleneck. Today, the bottleneck is often how fast your computer can move data from storage to the screen. browser

Conclusion: The Smart Approach

The default setting (-1) is correct for the vast majority of users. Mozilla’s engineers have spent years fine-tuning the adaptive algorithm to balance responsiveness against memory pressure.