This extension collects your data.
If you are someone who cares about online privacy do not use this extension.
They were involved in a spyware campaign known as "Big Star Labs" (which is their company name) back in 2018 (search it). At that time their extensions were removed from both chrome and firefox but for some reason they were reinstated.
Remember if they did this before there is no reason they wouldn't do it now. Just look at the extension's permissions. They can collect a whole lot of data on you. I used to use this extension and really liked until now but this was a deal breaker for me.