Jackie(Guokai) Han

Display and manage tabs vertically in the browser sidebar.

Automatically group tabs, save tabs/groups, and provide shortcuts for tabs/groups.

Generate and Scan QR Code.

A web video player for local files.

Clear current or all site data (cache, storage, etc).

Add useful keyboard shortcuts and default settings for bilibili player.

Keep your computer running or screen on, and return to default state by a timer.

Announce the time periodically, set custom recurring reminders and display time.

Display battery level, charging or discharging status.

A concise, lightweight and high-performance Transmission Manager and Web Extension.

A redesigned, productive and pragmatic new tab alternative.

A simple Chrome history manager.

A tool that display system CPU or Memory usage on the extension icon.

A bookmarks manager like macOS Finder.

Get notifications and quick look your new Gmail messages.

A blank new tab page with support for light and dark themes, no JavaScript.

A color picker for Web pages

Use omnibox to search MDN Web Docs with autocomplete.

Search and batch rename or delete local files.

Help non-English developers to check whether the translation of the current page is behind the corresponding English version.

A warning permissions checking tool for extension developers

Add spaces between Chinese/Japanese/Korean (CJK) and non-CJK characters.

实时接收 V2EX 消息提醒

The authentic classic Minesweeper game, supporting both retro and modern styles