For the simplest solution to mushrooming browser pages, xTab restricts the number of open tabs. You don't get any fancy lists, link retrieval, or tab management here, just a hard limit. Once you reach that limit, whether you set it at 5 or 50, you can still open new tabs—but xTab will start closing older ones. And you get to choose the order in which these tabs close: the least recently used, the least often accessed, or the oldest. Or, instead of having the extension automatically close old tabs, you can have it block any new tabs from opening. This means you'll have to manually close an existing tab before you can open a new one.