I don't think she mentioned un-installing IE8, just the Fireshot extension.
[q]
1) Uninstall Fireshot for Internet Explorer - very important! (Control Panel -> Add/Remove Programs) - do not uninstall from anywhere else
2) Close all Internet Explorer windows.
3) Install/Run Firefox.
4) Install the Fireshot version for Firefox.
5) Restart Firefox.
a) If this is the first time you've installed for Firefox, it'll ask if you want to integrate with Internet Explorer, click Yes.
b) If the option does not popup after restarting Firefox, click on the down arrow next to the Fireshot Icon and click "Integrate with Internet Explorer". (this is the option I chose)
6) Open an Internet Explorer window, and Fireshot should be installed and working. - the first time I opened IE it didn't work so I followed 5b again then step 6 worked and I was able to choose to use the free version of Fireshot in IE
[/q]
The Addons site does have a few that are similar.
Try these extensions...
"Save Image in Folder",
>
https://addons.mozilla.org/en-US/firefox/addon/614and "Screen Grab",
>
http://www.screengrab.org/& this is very handy...
"Capiche" from,
>
http://www.jansfreeware.com/jftools.htmScroll down to the bottom.