Markdown Scratchpad by Yan

A Firefox sidebar extension for quick markdown notes.

Features

• Sidebar stays visible while browsing
• Formatting buttons: bold, inline code, code block, bullet list, numbered list
• Copy as markdown
• Auto-saves to browser storage
• Keyboard shortcuts: Ctrl+B, Ctrl+``,Ctrl+Shift+C`

How to Use

• Toggle sidebar with Alt+M.
• Write note
• Copy

Notes

I built this extension since I got tired of sending premature prompts to claude.ai by accidentally pressing Enter while typing in their chatbox.

All I need is a temporary textarea where I can write whatever I want with basic markdown syntax support, then copy and paste it to claude.

I do not think I will add new features in the future.

• I built this using Claude Opus 4.5.
• This is the first Firefox extension I have ever built.
• Feel free to use this as you like.
• Repo url : https://github.com/mrlinnth/markdown-scratchpad