The top of the Links Overview has a check box Auto-update, which when checked will automatically update its links list to the links of the currently active window or Tab. When unchecked, the Links Overview keeps all the links when switching Tabs or navigating to new web sites, unless you manually click the Update button. This is useful when reading multiple articles of a site one after another, because then the links remain visible and you can click on them one after another to read the web site.