Update README

README.md

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-# h_da-institutional-Login
+# h_da Institutional Login
+
+## What is it for?
+This browser extension helps you to work easier, while searching for papers in the internet. It automatically fills the details about the Hochschule Darmstadt in several Shibboleth websites. It is also possible to fill in the username automatically, however the password for security reasons is not saveable.
+
+## Automatic login on the following websites:
+- Springer Link
+- IIIEXplore
+- ACM Digital Library
+- Statista
+
+## Currently working on the following websites:
+- Elsevier (ScienceDirect)
+- emeraldinsight