[tmikaeld]

Seems this particular extension is very upfront about the fact that they gather quite a lot of data from your tab history/usage/habits and then pass that to 3rd parties.

https://yourblocksite.com/privacy.html

[jbuss]

Hadn't considered that. Are there others you would recommend?

[astura]

If your work computer is not also your home computer you can just edit your hosts file to block social sites on your work computer.