Onetab basically refuses to load all previous tabs when you open the browser. By default, Firefox doesn't open old tabs until you move to them. Firefox also off

Onetab basically refuses to load all previous tabs when you open the browser. By default, Firefox doesn't open old tabs until you move to them. Firefox also offers tab groups by default as well. Most importantly, Firefox uses only around half as much memory as chrome and (in my use) seems to be more responsive with lots of tabs open.