WebDriver cannot be resolved to a type FirefoxDriver cannot be resolved to a type

Question

I found a similar error as mine on stackoverflow and added selenium webdriver jar files to the project using the below method :

right click on project--> goto build

Answer 1

even i got the the same error but then i realised that i missed 2 additional JAR files from Selenium 2.53.0.

selenium-java-2.53.0-srcs.jar selenium-java-2.53.0.jar

these are not in the sub library " libs" in selenium 2.53.0 but listed separately in the same folder.