# web-ext > A command-line tool for managing web extension development. > More information: . - 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}}`