Clocky Shot от Elías Leguizamopn

Clocky Shot is a lightweight Firefox extension that lets you capture screenshots of your current tab and automatically copy them to your clipboard.

No uploads.
No cloud storage.
No tracking.
Just a fast and simple way to grab what you see and paste it anywhere.

Features:

Capture the visible area of the current tab

Automatically copy the screenshot to clipboard

Minimal permissions

No data collection