Here is a cool extension for Chrome. It will essentially “pause” tabs that you arenot using. You can manually freeze a tab or set a time period that will make unused tabs auto freeze to take up less memory and resources for tabs you are not using.
Unload, park, suspend tabs to reduce memory footprint of chrome.
TO FIX THE MISSING ICONS PROBLEM:
Navigate to the extension directory
Open the popup.css file and under body change: