Doesn't work as intended. On YT, for example, in would only scroll the left column with a mouse wheel, while the main window is unscrollable.

與火狐自帶的右鍵截圖有衝突：截圖時候滾動滑鼠滾輪失效。

can't load photos in instagram page with this scroll bar.

So great! Wish there was an option to change scroll bar height/color. But otherwise, an absolutely perfect hidden scroll bar implementation! Full-Screen browsing is so much better now! Thank you!

Update: As some have mentioned, it completely blocks scrolling through any means on sites like YouTube. :( And there's no add-on icon to allow enabling/disabling for specific sites. :( Sad panda. This was almost perfect.