Add Add-ons page to manual (#195)

* Update addons.md

* Added old instructions back

* + user1823 suggestion

src/addons.md

@@ -4,8 +4,8 @@ Anki's capabilities can be extended with add-ons. Add-ons can provide
 features like extra support for specific languages, extra control over
 scheduling, and so on.
 
-To browse the list of available add-ons, select the Tools>Add-ons
-menu item, then click on Get Add-ons.
+To browse the list of available add-ons, select `Tools` → `Add-ons`, then click on `Get Add-ons`.
+Alternatively, open [ankiweb.net/shared/addons](https://ankiweb.net/shared/addons) in a web browser.
 
 If you have downloaded an add-on that is not working properly, or if you
 accidentally made a mistake when editing an add-on, you can use the