How to open a new tab using Selenium WebDriver?

Question

How to open a new tab in the existing Firefox browser using Selenium WebDriver (a.k.a. Selenium 2)?

Answer 1

 Actions at=new Actions(wd);
 at.moveToElement(we);
 at.contextClick(we).sendKeys(Keys.ARROW_DOWN).sendKeys(Keys.ENTER).build().perform();