I get 3 issues:

1) it doesn't save settings;

2) icon is showing "new" every time I launch Firefox;

3) I can't deselect "Android Version"

The Chrome add-on has "Video recording" feature, but why doesn't the Firefox have it?
Please consider adding it, and my rating would be to five stars!

It's spying on users. Every time an image is saved a GET request is fired to https://everhelper.me/nimbus-download-image.html.
___
Copy functionality is still there: Just right click finished image and select 'Copy Imgae'. API to support dedicated 'Copy' button was removed by Firefox in version 57.

No copy to clipboard, and SPAM! Everytime I open firefox I am redirected to

http://nimbus-screenshot.everhelper.me/releasecapture-ff.php

This is irritating and seems to be a gimmick to redirect users to your website.

Was the best, but it's all over now... What will become all my old notes?

copy to clipboard gone, reallyyyyyy wtf?

GG

http://nimbus-screenshot.everhelper.me/releasecapture-ff.php (How to disable this??)

and

sync.everhelper.me (why they are trying to connect everytime?)

Not usable anymore since the clipboard functionality was removed. It was nice having this right in-browser. Back to Snipping Tool. :(

Does not work with FireFox anymore!

Does a great job. Though I have not found a way to change the default save image format to jpg. Overall, very happy I found this one.

doet wat ie moet !

Best screenshot addon I used so far (and I tried many). It's very intuitive and comes with many features. Absolutely perfect. Great job!!

It's not working..
clicking on the Button does nothing at all.

Previously one of my favorite addons! =/

New version works for me. Took couple of days to get used to it, now no probs.

Old Ver. 9 was best of the best. Now rate it as a "One". Losing the copy toolwas a big mistake and they followed the pack by making it soooo slow. Poor choice now! I won't donate again unless they fix the tool.

Used to be GREAT, now not usable at all. I can already screenshot without this, it was only useful in being able to select what you need and THEN paste it where you need it. Now that this function is gone, no use for this app. Hope it comes back!

I used and really love this add-on

"Save screenshots to a PDF" — не нашел этого функционала, скриншоты сохраняются только в PNG или JPEG. Часть функционала платная.

Editing is easier in new version but really miss the copy to clipboard.

Few weeks ago it was a brilliant and quick entire page screen grabber. Since v.12 it is a slow piece of shit. Sometimes it won't work. Garbage.

Very quick I found and recommend you Fireshot for full page screen shots.

'If it ain't broke, don't fix it' : The Version 9 is much snappy compared to the new version. The new version is terrible. Laggy, slow respond and will just make your browser freeze. So disappointing with this Version 12.

It works great for me, although with the current Firefox there is a slight glitch. After installing the extension I clicked on the icon and got a blank white php page. I closed the tab and then clicked on the icon again and now the extension seems to work as expected.