Have been looking for an alternative to grab and drag for a long time, finally found this and it works almost identically. There is noticable stutter when scrolling through pages that have multiple embeded videos and a ton of images though it works smoothly once the page has been fully loaded. Momentum and infinite scroll makes scrolling so much better. The developer seems to be actively working on this add-on aswell.

If I hold the middle button while on a link, scroll down and back up, then release the middle button while the mouse is on the same link, the link is then activated. This is quite annoying and didn't happen with Grab n Drag. Is it possible to disable activating a link once scrolling has been performed? It is very easy to hit this problem on pages with many links, e.g., the BBC news page http://www.bbc.co.uk/news. I often middle click on the "main" story (a huge link near the top) scroll down to see if there's any stories of interest, then scroll back to the top. This often inadvertently triggers opening the main headline link.

Otherwise great add-on. +1 with the request to display a different cursor while scrolling.

Its a very useful Add-On and works great so far! The Momentum feature works great too, even its a bit choppy sometimes and could be a bit smoother - but i'm not sure if its the Add-on or just my PC/Firefox @55.0b7@64 bit.

EDIT: Alright, it works flawless and butter smooth after enabling e10s@7 instances with following settings:

Grab and drag (like on a smartphone): 1
Momentum enabled
Page weight: 300
Additional speed: 0
Additional duration: 0

Advanced momentum setup:

Compute from last: 50
Mouse stop detection: 30
Tracking speed: 5
Smoothness: 1

Keep the great work going Juraj!

We need an option to emulate dragging the scrollbar, just like grab'n'drag had.The current method of selecting the drag speed is not optimal for sites with a lot of vertical content.

Amazing alternative for grab-n-drag! Now waiting for smooth momentum gestures ;)
Thank you!

A great alternative to Grab and Drag. Thank you!

Great

I have used "Grab and Drag" extension, but it does not work well with Fx 53+. This extension rescued me.

Note: if you configure "dom.event.contextmenu.enabled" option to false, context menu will be displayed when you scroll with right-click.

Was looking for an e10s replacement for the Grab and Drag extension, this one works even better!

i hope it is possible to work on this site too to be truly "anywhere" otherwise still perfect, no 4.5 so i'll give it a 5 :)

New version works very well.

Very good. But please add a nornal right-click scrolling (without context menu).

Thank you for making it compatible with e10s.
One small request: option to change cursor style to "all-scroll" during scrolling

Admittedly, this is a very efficient add-on and it does exactly what it says on the tin. (thus 5 stars)
As others have already stated, it's a convenient replacement for the "Grab and Drag" add-on, albeit it is much more minimalistic than the latter. Don't get me wrong, I love minimalism in the right places, I just have to say that I would prefer the way Grab and Drag actually "drags" the page directly (1 on 1 or with an added multiplier, similar to the way Acrobat scrolling works, or on mobiles/tablets), over just virtually dragging the scrollbar. I mostly just ignore the actual scrollbar anyway.
Also, the left mouse button should be an option.
Other than those two aspects, I think this is great.

Good replacement for "grab and drag", and e10s compatible too!

Нажимая на правую кнопку мыши и изменяя положение мыши, вы начинаете двигать ползунок прокрутки старницы. Очень быстро двигает страницу. Очень удобно. Спасибо!