Email Extractor finds and copies to clipboard valid email addresses from web pages a user visits. To use: Right-click on the extension icon to open an options window. You can select an execution mode and the resulting list options. Execution Mode: * In the "once" mode (default), when a user clicks the extension icon, the Extractor collects all emails from the active tab and copies them to the clipboard. * In the 'background' mode, when a user clicks the extension icon, the Extractor starts collecting emails from web sites a user visits. When a user clicks the extension icon again, all collected emails are copied to the clipboard, and the collection process stops. In both modes, all duplicate emails are collapsed into one. Hovering over the extension icon shows a tooltip with a current mode. An indicator shows a number of emails collected: in black while the Extractor is collecting data, red when the collection is done.