Add screenshot to README

README.md

@@ -1,7 +1,21 @@
-# Problematic-requests, aka ICD scanner
+# EN
+
+A simple Firefox extension that visualizes all the data that a given
+website sends to third parties.
+
+It aims to help website administrators audit their website for stray
+scripts while for exapmle evaluating a given CMP solution, as well as
+help users report data-backed complaints and requests regarding
+websites that are too data-hungry.
+
+![screenshot](./screenshot.png)
+
+# PL
+
+## Problematic-requests, aka ICD scanner
 
 Wtyczka pokazująca, jakie dane zostały ~~wykradzione~~ wysłane do podmiotów trzecich przez odwiedzane strony.
 
-## TODO:
+### TODO:
 
 - Używać https://github.com/InteractiveAdvertisingBureau/iabtcf-es/tree/master/modules/core#iabtcfcore do wizualizacji "zgód" zebranych przez CMP-y od IAB