What is difference between selenium 2 and selenium 3?

Related questions

1. How long will it take to learn selenium?
2. Does selenium cause weight gain?
3. Which automation testing tool is easiest?
4. What is UFT selenium?
5. What is Selenium Grid?
6. What is the use of selenium?
7. What is the difference between selenium and Appium?
8. What is Selenium tool?
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10. What are the advantages of selenium?

Tags

1. #original
2. #stable
3. #replaced
4. #package
5. #browser
6. #backed
7. #fixes
8. #selenium
9. #mozilla
10. #legacy
11. #powering
12. #major
13. #webdriver
14. #firefox
15. #between
16. #internals
17. #something
18. #contained
19. #which
20. #difference