Take Video Screenshots (+ GIF Maker) – Get this Extension for 🦊 Firefox (en-US)

Page Screenshot – Get this Extension for 🦊 Firefox (en-US)

Screenshot Button – Get this Extension for 🦊 Firefox (en-US)

FireShot: Full Web Page Screenshots (♥♥♥♥♥) – Get this

Full Page Screen Capture & Visual Feedback – Get this Extension

How to enable screenshots in Firefox - Quora

Screen Recorder – Get this Extension for 🦊 Firefox (en-US)

Screenshot Button – Get this Extension for 🦊 Firefox (en-US)

FireScreen - Screenshot Editor – Get this Extension for 🦊 Firefox

Firefox Extension – Moqups Help Center

Screenshot – Get this Extension for 🦊 Firefox (en-US)

Lightshot (screenshot tool) – Get this Extension for 🦊 Firefox