Inline Value Spinner от Mehdi

Inline Value Spinner adds small step buttons next to numeric input fields on web pages (e.g., setinrate.com).

Click the up/down buttons to quickly increase or decrease values.

Supports smooth, responsive interaction with cancel/undo support.

Improves efficiency for frequent numeric input tasks.

Lightweight, privacy-friendly: no data is collected from users.
This extension works directly on web pages and does not require additional software or payment