Added Firefox and WebKit links

Author: RobertLarsen

README.md

@@ -53,10 +53,18 @@ as well. Contributions are welcome.
 
 ## Writeup and Exploit Tech
 * [Attacking WebKit Applications by exploiting memory corruption bugs](https://docplayer.net/19835745-Attacking-webkit-applications-by-exploiting-memory-corruption-bugs-liang-chen-keenteam-chenliang0817.html)[slides]
+* [Vulnerability Discovery Against Apple Safari](https://blog.ret2.io/2018/06/13/pwn2own-2018-vulnerability-discovery/)[article]
+* [A Methodical Approach to Browser Exploitation - six part blog](https://blog.ret2.io/2018/06/05/pwn2own-2018-exploit-development/)[article]
+
 
 # Firefox
+## Basic
+* [SpiderMonkey Internals](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Internals)[article]
+* [JavaScript:New to SpiderMonkey](https://wiki.mozilla.org/JavaScript:New_to_SpiderMonkey)[article]
+
 ## Writeup and Exploit Tech
 * [CVE-2018-5129: Out-of-bounds write with malformed IPC messages](https://infinite.loopsec.com.au/cve-2018-5129-how-i-found-my-first-cve)[article]
+* [Firefox Spidermonkey JS Engine Exploitation](https://blog.infosectcbr.com.au/2020/01/firefox-spidermonkey-js-engine.html)[article]
 
 # Misc
 ## Browser Basic