Is Firefox built on Chromium?

Related questions

1. How do I install Chromium on Windows 10?
2. Is Firefox based on chromium?
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4. What's the difference between Microsoft edge and Internet Explorer?
5. Is it safe to use chromium?
6. Is chromium bad for your body?
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Tags

1. #fight
2. #engine
3. #windows
4. #browser
5. #truly
6. #firefox
7. #chromium
8. #rendering
9. #place
10. #always
11. #source
12. #mozilla
13. #doesn
14. #microsoft
15. #built
16. #welcomes
17. #first
18. #google
19. #moving