web-ext: add page (#2739)

pages/common/web-ext.md

@@ -0,0 +1,36 @@
+# web-ext
+
+> A command line tool for managing web extension development.
+> Homepage: <https://www.npmjs.com/package/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}}`