This is uBlock Origin (the good one) and not uBlock. Info https://www.reddit.com/r/ublock/comments/32mos6/ublock_vs_ub...

Amended. The Github repo is named `uBlock`[0] so there will be confusion for people about which is the 'best' version (Hint: it's uBo)

[0] https://github.com/gorhill/uBlock