SteemContext allows switching between all Steem frontend applications using the context (right click) menu. It supports Steem links on any website, and you can configure the frontend applications you want to use.
You can use the Chrome store directly to install this extension (link on the Chrome banner).
If you want to load it directly, you may build yourself, or use the the releases on Github, there is a built zip file which can be extracted and loaded.
Transform into a WebExtension for compatibility with Firefox.