diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,2 +1,24 @@
-# Builder
+# Spitfire Builder
 
+This is a simple bash script for building the Spitfire Browser based on Mozilla Firefox source code.
+
+## Dependencies
+
+- Mercurial (hg)
+- Git
+
+## Usage
+
+Run the script `builder.sh` with the following options:
+
+- `-a, --all` : Perform all steps (build, clean, update).
+- `-b, --build` : Build Spitfire.
+- `-c, --clean` : Clean build.
+- `-u, --update` : Update Mozilla repository.
+- `-p, --patches` : Update patches.
+- `-h, --help` : Display usage instructions.
+
+For example:
+
+```bash
+./builder.sh --all
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