I been noticing lately alot of posting of FF excessive RAM usage or Taxing on the system Resources. My best guess here is that FF during the Auto updates has become corrupted from either the update or some other software causing the update error thus leading to excessive RAM usage causing system freezing or unresponsive Browser or making the computer in General slow and unresponsive. Below is what one should really do in order to eliminate if the Browser is the culprit to the problem. 1. Download the latest version of FF based on your O/S version 32bit to 32bit Browser or 64bit O/S to 64bit Browser https://www.mozilla.org/en-US/firefox/all/ 2. Backup your BookMark if you have one created or any CSS style you added as well 3. Write down any Addons/Extensions so you can find and download them later 4. Uninstall all FF installs and Deleted the Mozilla folder 5. Restart 6. Reinstall the new FF and then update with the Addons/Extensions 7. Restore your BookMark back. 8. Run FF to see if the problem returns or not Now if you do all this and still have problems then it's not a FF issue but something related to either adblockers, A/V being to aggressive or Malware/Virus is present and blocking any Browser from working correctly. And this point would require a Computer shop to resolve the problem.