Using a tab grouping plugin could help you. Recently I have installed tab kit (which groups tabs and show them in vertical layout) and it made browsing much eas

Using a tab grouping plugin could help you. Recently I have installed tab kit (which groups tabs and show them in vertical layout) and it made browsing much easier - it automatically puts new opened tabs in correct groups so I know where each tab came from; also it shows unread tabs and allows you to regroup them and fold a group. If you are a FF user I would strongly recommend you this plugin (Tab Kit). However it seems that it doesn't work with new firefox versions; but there is another called Tree Style Tab with similar features.