Plasmo

Judgement

What it is

Framework or platform

What it does

A framework for building browser extensions in React and TypeScript that generates the manifest, handles content scripts and popups, and builds for Chrome, Firefox and Edge.

Adopt it when

You are writing a browser extension in React and want hot reload and one codebase for several browsers.

Watch out

It is still pre-1.0, built on Parcel, and its development has slowed as WXT has gained ground.

Ready for

Usable

Runs as

Command line and library

Built with

TypeScript, React and Parcel

How established

Established: started 4 years ago, latest release v0.90.5.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Plasmo → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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