I no longer use external Screen capturing software for my web browsers anymore. I use addons when best possible.
I am an Opera and Firefox user.
For Opera 20 I currently use Nimbus Screen Capture; https://addons.opera.com/en-gb/extensions/details/nimbus-screen-capture/?display=en
I have tested other Screen capture addons on Opera 15+ (blink) and so far Nimbus Screen Capture is the best and has the best developer support.
For Firefox (I know not relevant here) on firefox I use both; https://addons.mozilla.org/en-US/firefox/addon/screengrab-fix-version/ AND https://addons.mozilla.org/En-us/firefox/addon/screenshoter-fixed/
Just offering my two cents (or shall I say pennies)