Works very well and the features are nice. It does not support to capture extremely long pages though, FF hangs when doing this.

Update 2021: Seems they have addressed the issue, and I can now capture very long pages with animations. Good job.

Great screenshot extension. It works smoothly, it's intuitive and well, it accomplishes everything it promises.

Excellent addons, very helpful tool, some issues on sites working with iframes

PERFECT!!! Just what I needed~!
Spent money on SnagiT Screen capture tool and it quit capturing webpages without extension from Firefox or Chrome browsers, but this tool works FAR BETTER!!
Thank You Nimbus~!

This add-on is a beauty. 100%. It's interface is incredibly user friendly. And it's packed with every feature you could possibly think of for creating and working with screenshots. I am able to quickly cut, edit, and copy/paste the image to another browser window directly from the app without needing to save it to my hard disk.
It is stable. Enjoys stable updates regularly and doesn't create issues with the browser or the pages I am viewing. Can't say enough about it!

Works very well for most screen shot needs. It's also great for screen recording IF you use it on Chrome. I use it on both my PC and Mac.

Расширение Nimbus Screen Capture оказалось одним из наиболее удобных среди аналогичных:)

It Does The job, i like it

I just love Nimbus!