Command-line tool

web-ext

brew/web-ext

Checked 25 Oct 2026, 21:11 UTC · Still published on npm

Command-line tool to help build, run, and test web extensions

Website Source

At a glance

Type

Command-line tool

Install on

Windows, macOS, Linux

Last checked

25 Oct 2026, 21:11 UTC

Install it

Windows

npm install -g web-ext

macOS

brew install web-ext
npm install -g web-ext

Linux

npm install -g 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

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