Sometimes, on a slow PC, web pages are scrolled down too quickly, before content has become visible, meaning that content is not captured, resulting in blank portions of the captured page. Other times, scrolling is too slow and Firefox flashes up a banner saying a script on the page is slowing the computer down and asking if it should be stopped. Could there be a way to control the scroll-down speed?

the best add that i ever used

Works almost every time the way you expect it to. No other plug-in or stand-alone manages to capture pages as reliably. And no other names the saved captures as intuitively.

Really Good Ext Many Thanks Guys

Good Firefox addon but for the love of everything, it needs to remember the last location you saved a screenshot to and save in the same place, unless instructed otherwise, the following times. That is software development basics and should be the default for every single program and plug-in out there, unless configured otherwise in a settings menu somewhere.

Excellent. Allows full page or selected area screenshots in to various formats. Simple to use.

Takes a few seconds to capture the website, so be patient :) Then offers the option to save as pdf, image, copy to clipboard etc. Works well and is flexible with options.
It can be triggered with a button from the toolbar, which is good for capturing mouseover and popup texts which would disappear with right click - take screenshot.

A real working fullpage screenshot Add-on

This is quite the best browser screen-shot saver I've come across. Thoroughly recommended!

Created an empty file after taking longer capturing the page then competitors, competitors also don't push another lite version down your throat. I tried this thinking the negative reviewers must be stupid given the majority of positive reviews, I was wrong. Don't make my mistake. Go somewhere else.