Can't select areas for capturing, nothing happens. Disappointing.

Title says it all. I click 'Capture selected area' and nothing happens. It shouldn't be this challenging!

This add on won't allow me to save to the folders where I want to save them. My time is valuable and I don't have time or patience the allow an add on to do what it wants to do, and then I have to go behind it and fix it; I refuse to do online storage after having so much of my life hacked in databases; can't this work for those who want to save to the nether world , and for those of us who want to save it to specific files on our computer? Is that really too much to ask?

Have to disable Re-enable when trying , then Doesn't work without faffing. Clips don't go to clipboard and can't paste anywhere else. Quicker to use ScrPrnt and Paint.

Terrible! Not even close to the ease of use and quality of others I've used.

when trying to capture an entire page, the icon just keeps saying "capturing". Capturing the visible part works, though.

Awesome Screenshot 3.0.21
Firefox 55.0.1
Windows 7 Home Premium x64 SP-1

Takes forever to capture (using this Mozilla page for testing a capture). If I change focus to another window, even just Notepad, the capture is aborted in Firefox. I'd wait for over 12 minutes for a page capture while resisting to change focus to other windows and still the add-on failed: just a constant worthless "Capturing" message. Great, a super-slow add-on that won't continue the capture if focus changes to another window while waiting for their capture to do anything. Other capture programs (e.g., Nimbus Screenshot and Pearl Crescent Page Saver) are immediate when I capture a page (but those others have a short remaining lifetime since they are not Web Extension add-ons). This add-on is unusable (in my setup as noted above).

I just want to capture a screenshot of the whole webpage. When I selected the option it says that it's capturing but never actually does anything. I need a one click solution and this is not the answer.

I tested Version 3.0.21 (Last Updated: June 22, 2017)
on Firefox 54.0.1 (32 bit) on Windows 8 with 3.5 GB memory.
It installs Ok.
The first page I tested it on was 4chan's Comic and cartoon catalog, not particularly large with small thumbnails.

Problem 1: the addon slowly scrolls down the web page to complete its capture
Problem 2: the browser locked up for a good 5 minutes while the addon was (I guess) composing an editable screencapture in a new tab.
Problem 3: I noticed data was being downloaded from a third party website. Why? Will this work offline like other page savers?
Problem 4: once the capture was complete the cursor changes to a kind of paintbrush and the browser ran very slowly.
Memory use reached 3.5 GB.
I had to control-alt-delete for two minutes to regain my task manager and then able to close the Firefox tab with the editable capture. Browser and computer return to noemal operation.

Clearly something needs fixing here.
Pearl Crescent Page Saver does not do this, it just captures the whole web page and saves it in a file.
I use Pearly Crescent in my other Firefox profiles with no problem.
Pearl Crescent Page Saver does require a restart however, which is why I tried this "Awesome" one.

This might work for some people, but such an initial experience is enough for me to swear never again.

This add-on does not capture the selected area, but results in an enormous horizontal shift.

This addon is corrupted

Not working in andoird version

Installed, rebooted Firefox 54. Tried to capture. It sits there indicating it is capturing. Nothing happens. Perhaps I need to create an account, but I don't want to. Uninstalled.

Took a long time to capture page, got bored, did something else for a min, the working icon had stopped, and now I don't know if there is a screenshot somewhere or not!

scrolling webpage can't saved nor can it be saved to clipboard.

Couldn't find the picture after I took the shot. hmmmmm....

The positions almost never work. I place a text-box in one corner and it starts typing text in another corner.

Problematic capture: unless I want to use Diigo or Google, there are no other options because the Clipboard almost always fails.

Always full of bugs. Currently when I type captions, they are blank, and will only appear after I've finished. And then I realise it has run over and have to delete and repeat everything.

And probably my least favourite - all the typos and grammar errors. If you're making an add-on for English-speaking countries, get somebody to check your typos, otherwise it just makes you look extremely unprofessional.

When I selected a portion of the screen to capture in a Plarium.com flash-based game, the tool selected an area to the right of, and a different rectangular shape and size than I had selected.

Took me to a pointless editing page with nothing on it, then wanted me to sign-up to them to see my screenshot, which was hosted somewhere else. Uninstalling, too much hassle

Doesn't perform the basic function. Pays little attention to the area selected, captures pretty much random sections of the screen.