Не могу даже поставить дополнение так как почему-то оно определяет версию браузера как 60, хотя у меня установлена последняя на данный момент 66.

UPD.
I understand the problem. Currently the addon isn't working if privacy.resistFingerprinting is set to true under about:config

Gesturefy is a good addon, but it should be run in High Priority to enable it to draw over webpages smoothly and accurately. Often times I try to perform an action, and it lags or doesn't register the entire mouse gesture, and I have to repeat it.
This really makes me miss the good old built-in mouse gestures that the old Maxthon browser had a few years back. To this day I haven't seen any other browser that has as smooth and reliable gestures as the old Maxthon browser did (v1.6.x).

This is the best mouse gesture add-on that I've ever used. Fully customizable and easy to use, with super intuitive options. I would give it 6 stars if I could!

Very good! Thank you.

我用了好多年了。谢谢。