What’s the difference between Extension.js and tools like WXT / Plasmo / web-ext?

[Alptoga]

What’s the practical difference between Extension.js and tools like WXT, Plasmo, or Mozilla’s web-ext? When would I pick one over the other?

[cezaraugusto]

good question.

the short answer is that Extension.js tries to stay close to the native WebExtension model while still giving you a modern workflow.

instead of introducing a heavy abstraction layer, the tool focuses on a few things:

• compiling the manifest per browser
• producing browser-specific builds
• providing consistent dev / build commands
• keeping the generated output transparent

so the typical flow looks like:

1. install the extension package as a dev dependency
2. wire your scripts (dev, build, start) to the Extension.js commands
3. let the tool produce browser-specific artifacts while your source stays the same

Example:

{
  "scripts": {
    "dev": "extension dev",
    "build": "extension build",
    "start": "extension start"
  }
}

from there:

• extension dev: watch mode for development
• extension build: production artifacts
• extension start: build + launch

the important design choice is that the output still resembles a normal browser extension. if you inspect the generated artifacts, you’ll see a standard extension layout rather than a framework-specific runtime.

that makes debugging easier and keeps migration fritcion low if you ever want to move to raw WebExtension APIs.

if you can share a bit more about your setup (existing extension vs new project, which browser targets, etc.), I can give a more concrete recommendation.

[Alptoga]

Appreciate the detailed explanation