Update WEB-EXTENSIONS-HOWTO.md

WEB-EXTENSIONS-HOWTO.md

@@ -6,8 +6,8 @@ First, it must have a `common.webExtension` flag in `io-package.json` file that
 Second, `native.webInstance` flag in `io-package.json` has to point to the instance name of the web-adapter for which the extension should be loaded. 
 Or simply load it for all instances via `"webInstance": "*"`.
 
-Third, make sure `common.enabled` is set to true in `io-package.json`: `"enabled": true`.
-If you're working with **dev-server** please note: dev-server does **not set the instance to enabled**, you have to do this manually: Navigate to `system.adapter.<ADAPTER_NAME>.0`, use `edit object` to set `"enabled": true` within object data. If not set correctly, the web extension will not be activated by web adapter.
+Third, make sure `common.enabled` of the respective web-extension adapter is set to true in `io-package.json`: `"enabled": true`.
+If you're working with **dev-server** please note: dev-server does **not set the instance to enabled** when using "dev-server watch", you have to do this manually: Navigate to `system.adapter.<ADAPTER_NAME>.0`, use `edit object` to set `"enabled": true` within object data. If not set correctly, the web extension will not be activated by web adapter.
 
 Fourth, the file `lib/web.js` (or whatever) must exist, and it must export a class.
 ```