Rated 4 out of 5 stars

only 4 star because start @ver 5.7.27, cys download something huge in the background without touching the addons. must close or restart firefox to close the suspicious connection. pls fix. EDIT: detailed what happen is when i visit youtube page video it seem ycs start downloading something from youtube in the background before clicking cys icon. it still download even after i left from that page. i notice this because i have very slow connection 133KB/s download. please make sure cys don't request youtube anything yet before i click the cys icon. this tested on win7x64 ultimate firefox64 latest stable from portableapp with forced e10s mode and using youtube no buffer addons. previous version doesn't have this problem

This review is for a previous version of the add-on (5.7.27).  This user has other reviews of this add-on.

Impossible, CYS doesn't work that way...it cant download "something huge in the background without touching addons". How do you know it's CYS responsible for your "suspicious connection"??? This does not belong here in the review section, please contact us at cytsaver@hotmail.com with some more info.