Snap Linkit by Rob B.

Snap Linkit lets you select and manage multiple links, check-boxes, and buttons on any webpage with a simple click-and-drag gesture.

Features:
Drag to select multiple links, check-boxes, or buttons at once
Open all selected links in new tabs (with memory-saving unloaded mode)
Copy selected URLs to clipboard
Download files from selected links
Configurable keyboard shortcuts (Alt+Shift+S to toggle, Alt+Shift+O to open)
Site blacklist/whitelist for fine-grained control
Adjustable tab open delay to prevent browser overload

Privacy 100% Guaranteed:
Zero data collection — no analytics, no telemetry, no tracking
No external network requests — everything runs locally in your browser
No accounts required
Open source