Mazzarolo Matteo
Mazzarolo Matteo

Another Tab: An open-source bookmarks Chrome extension

By Mazzarolo Matteo

Today I published Another Tab: An open-source Chrome extension that shows your bookmarks when you open a new tab.
Built with Create React App and TypeScript.
The project source code is available on GitHub.




I initially built this extension just for personal use… and for trying building a Chrome extension 🤷‍♂️, so for now it has just the features that I need…
That said, PRs are welcome!
Check the DEVLOG to see the history of the project.


  • Shows your bookmarks in the new tab page
  • Bookmarks filtering/search
  • Keyboard navigation support
  • Bookmark folders visibility toggle
  • Themes support
  • Drag & drop bookmark sorting


  • React (using Create React App) and hooks
  • TypeScript
  • Styled-Components
  • Redux, Redux-Saga and Typesafe-Actions


Feature request

I already created a few issues with some features that I feel like would be really welcomed addition, and I’m open to any other additional suggestion… especially if you already have an idea to implement it’s UI/UX.

Developing locally

This is a standard Create React App, so you can easily start working on it by simply cloning the project and running yarn to install all its dependencies.
To develop the app locally you can run yarn start, I already included some fake bookmarks to simulate the production behavior of the extension.

Development tips

This app uses TypeScript, React Hooks, Redux and Styled-Components, so you might need to be comfortable with these technologies to completely understand the codebase.
The app is still pretty simple, doesn’t have too many components and most of the logic is just in the Chrome Bookmarks parsing and in the Redux sagas.
If you feel intimidated by the codebase please just open an issue/send a PR, I’m open to discussion and tips.
Also, if you’re not comfortable with hooks feel free to use class components.

Chrome Web Store deployment

I setup a semi-automated Chrome Web Store deployment using CircleCI.
It currently runs only when the master branch receives a new push, but I still haven’t automated the version number bumping (so I still have to do it manually).
It would be great making the publishing step manipulate the manifest.json so that it reflects the package.json version and/or a git tag.

Live example deployment

The “live example” is just a customized version of the production build of the app deployed on GitHub Pages. If you check the gh-pages script in the package.json you’ll see that I’m setting a REACT_APP_IS_LIVE_EXAMPLE environment variable before running the GitHub Pages deployment: this will allow the build to use the fake bookmarks instead of trying to get them from the Chrome API (like if it was an extension running in the browser).

GitHub organization?

If the app starts getting contributions I’ll gladly create a new ad-hoc organization for it, instead of keeping it in my personal profile.