CF Tracker is a productivity chrome extension. it's a free extension , it has 1,000+ active users since released its first version, it earns an average rating of 5.00 from 3 rated user, last update is 814 days ago.
Find time spent on a particular problem on codeforces.com. It helps in increasing speed which is vital for any competitive programmer.
You could download the latest version crx file or older version files and install it.
English.
100% user give 5-star rating. Read reviews of cf tracker
You could find more help information from cf tracker support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of cf tracker.
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Very useful to track my program time