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Extensions 
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MyPoints Score
Score alerts you to Point-earning opportunities and coupon codes when you shop. Score does the work. You get the savings.
StraTistiX with aRPEe Score for Strava
Add lots of features to Strava website (forked from StravistiX plugin and enhanced with additional goodies and tweaks)
Live Cricket Score Bar
Get Live Cricket scores of today's matches updated on real-time. A totally new experience scoreboard as seen on TV broadcasts.
TOEFL High Score Words
TOEFL High Score Words includes 2000 words that are grouped by 150. It is designed for high scores hunters in TOEFL tests.
Readability Score
Given a body of text receive a score on how readable that text is based on the flesch-kincaid readability index.
frienddl.io - friend finder & score keeper
Tool to find friends in public rooms on skribbl.io and keep track of high scores
Coursera score
This extension gives you ability to sum points that you gained from quizzes and assignments taken and calculate your rate.
