CF Analytics: https://chromewebstore.google.com/detail/cf-analytics/hhljbjodjdbjbggddjaidojnlmaobcpo
CF World Standings: https://chromewebstore.google.com/detail/cf-world-standings/caginmipmmelcmijagfppgdljepiioak
CF-predictor: https://chromewebstore.google.com/detail/cf-predictor/ocfloejijfhhkkdmheodbaanephbnfhn
Codeforces Calender: https://chromewebstore.google.com/detail/codeforces-calendar/ehmnahdmmiibcbebjafdgjlomhnommpo
Codeforces Practice Tracker: https://chromewebstore.google.com/detail/codeforces-practice-track/cnahgdhboflcnojgmeehhhfeoojifonm
Codeforces Customizer: https://chromewebstore.google.com/detail/codeforces-customizer/akmlgflgekmnameijijkefhochekjfgg
Codeforces Better Comments: https://chromewebstore.google.com/detail/codeforces-better-comment/dmkcpaljgkhdcachgfmplaoldejhafgn
Carrot: https://chromewebstore.google.com/detail/carrot/gakohpplicjdhhfllilcjpfildodfnnn
Thank you so much! Some of them don't seem too useful, but the CF-predictor and the Carrot were what I was looking for. The CF Analytics are also cool. To be honest though, those seem like the only good ones. Again, thank you.
Yeah, They are useful. You are welcome!