Works perfectly and even in players that dont support any speed changes by themsevles, which is a big plus
Only 4 stars because there is no option to make exceptions for some sites, where speed change is not needed or native speed change is sufficient, or at least a button in the interface to disable extension, opening extension manager every time is a bit repetative

It would be nice to have different speeds in different tabs / pages. And get the 4x key back.