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As it is now, it's mostly unusable on a screen that's 1280 wide since most of the functionality is hidden offscreen. That's mostly Mozilla's fault, but hopefully the developer will find a way around their incompetence.

previously im firefox 17 user, it works, now im upgrade to 52.9.0 and the toolbar is gone, what should i do ??

This provides a lot of very useful tools, but if it's pinned to the overflow menu, the panel it opens in is too small to use them all. There doesn't seem to be a way to resize the panel or scroll within it.

I loved this extension until recently when the latest update comepletely broke it so it's making my browser crash everytime I try to use it.I've had to disable it since the new patch started closing my browser down.I'm on Firefox v56 on the 64 bit install and that's what started crashing after this new update.
It was working fine on my other 32 bit install of Friefox v39 so I might see if downgrading to that one might help.

Genial!!!