diff --git a/docs/README.md b/docs/README.md
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@@ -32,4 +32,7 @@
 
 # hardening firefox
 
-* [[eff.org: surveillance self-defense](https://ssd.eff.org/en)]
+* eff.org: [surveillance self-defense](https://ssd.eff.org/en).
+* wikipedia: [Browser fingerprinting](https://en.wikipedia.org/wiki/Device_fingerprint).
+* wikipedia: [Browser security](https://en.wikipedia.org/wiki/Browser_security).
+* wikipedia: [Browser exploit](https://en.wikipedia.org/wiki/Browser_exploit).