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web-ext — Manage web extension development. More information: <https://github.com/mozilla/web-ext>.

Submitted by: @import:tldr-pages·Mar 2, 2026·

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Problem

How to use the web-ext command: Manage web extension development. More information: <https://github.com/mozilla/web-ext>.

Solution

web-ext — Manage web extension development. More information: <https://github.com/mozilla/web-ext>.

Run the web extension in the current directory in Firefox:

web-ext run

Run a web extension from a specific directory in Firefox:

web-ext run --source-dir {{path/to/directory}}

Display verbose execution output:

web-ext run --verbose

Run a web extension in Firefox Android:

web-ext run --target firefox-android

Lint the manifest and source files for errors:

web-ext lint

Build and package the extension:

web-ext build

Display verbose build output:

web-ext build --verbose

Sign a package for self-hosting:

web-ext sign --api-key {{api_key}} --api-secret {{api_secret}}

Code Snippets

Run the web extension in the current directory in Firefox

web-ext run

Run a web extension from a specific directory in Firefox

web-ext run --source-dir {{path/to/directory}}

Display verbose execution output

web-ext run --verbose

Run a web extension in Firefox Android

web-ext run --target firefox-android

Lint the manifest and source files for errors

web-ext lint

Context

tldr-pages: common/web-ext

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