mention firefoxcss-store, r/firefoxcss and searchfox

readme.md

@@ -66,3 +66,9 @@ The theme I'm currently using: [RosyBrown Dark by Me](https://addons.mozilla.org
 ## Notable Mentions
 
 [schizofox](https://github.com/schizofox/schizofox) - Hardened Firefox flake for the delusional and the schizophrenics. You might find some interesting stuff there.
+
+[FirefoxCSS-Store](https://firefoxcss-store.github.io) - A collection site of Firefox userchrome themes.
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+[r/FirefoxCSS](https://www.reddit.com/r/FirefoxCSS) - A subreddit dedicated to Firefox customization.
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+[SearchFox](https://searchfox.org) - A source code indexing tool for Mozilla Firefox. It indexes C++, Rust, and JavaScript code.