StickyTab от MinoshW

StickyTab lets you write and save notes for any webpage you visit. Notes are tied to the URL, so when you return to a page, your note is right there.

Features:
- Notes auto-save as you type
- Extension icon turns yellow when a note exists on the current page
- View, copy, or delete all your notes from one place
- Copy individual or all notes to clipboard
- Works entirely offline — no accounts, no servers, no data sent anywhere