How do I add AdBlock to Firefox?

Related questions

1. Does Firefox have a built in AdBlock?
2. Does Firefox have an ad blocker?
3. Why do I still get pop ups when I have them blocked?
4. What is the difference between Mozilla and Firefox?
5. Where do I find ad blocker?
6. What is the difference between Chrome and Firefox?
7. How do I add AdBlock Plus to Firefox?
8. Does AdBlock Plus slow down Firefox?
9. Is Firefox Chrome based?
10. Does AdBlock slow down browsing?

Tags

1. #following
2. #trust
3. #screen
4. #button
5. #please
6. #adblock
7. #green
8. #section
9. #opened
10. #firefox
11. #click
12. #first
13. #install
14. #mozilla
15. #appears
16. #authors