Regarding AMBOSS:
#popclip
name: AMBOSS search
icon: circle filled AM
url: https://next.amboss.com/de/search?q=***
description: AMBOSS
(The above block is an extension snippet – select it to install the extension with PopClip)
This should work for the German version, if you use the English version you need to replace the URL. Just enter a term into the search field on the AMBOSS website and adapt the resulting URL from the browser‘s address bar.