update readme

README.md

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-# mfer-safe
+## MferSafe is inspired by [ApeSafe](https://github.com/banteg/ape-safe), which focuses on interact via Dapp's frontend.
 
-MferSafe is an Ethereum Transaction Simulator designed for Dapp interactions.
+By using MferSafe's browser extension, it will redirect all eth_xx rpc to MferSafe and record all transactions and make state mutation at local, so you can do lots of Dapp interactions seamlessly.
 
-You can use Dapp seamlessly and it keeps all transactions and state mutation locally.
+You can set the account address (ENS is supported) you want to impersonate and view the local transaction pool, inspect each transaction's event log and debug trace.
 
-How it Works:
+If you are using GnosisSafe multisig wallet, you can simulate the local transaction pool as a transaction bundle, and send the bundle via MultiSend.
 
-How to use:
+MferSafe also provides a convenient way to sign GnosisSafe transaction. When you simulate the transaction bundle, it shows up ApproveHash and ApproveHashCalldata.
 
-Build steps:
+You have 2 options to execute the multisig transaction.
 
-Apple Silicon macOS Prerequisite: 
+The widely used way is to sign the ApproveHash and set each participant's Signature Override field, then you can send a transaction to your wallet address and set the calldata to 'ExecTransaction Calldata'.
 
-`brew install pkg-config cairo libpng jpeg giflib`
+The other way of signing the transaction is calling 'approveHash' function by all participants and send execution transaction by the last participant.
 
-Build app:
+Demo:
 
-`./build.sh`
+```
+[![Demo Video](https://img.youtube.com/vi/zciR5oEg-uY/0.jpg)](https://youtu.be/zciR5oEg-uY)
+```
+
+### How to use
+
+1. Install browser-extension
+2. launch MferSafe app
+
+ ### Build
+
+ 	Apple Silicon macOS Prerequisite:
+	`brew install pkg-config cairo libpng jpeg giflib`
+
+1. [Install tauri build environment](https://tauri.app/zh/v1/guides/getting-started/prerequisites)
+2. [Install golang](https://go.dev/doc/install)
+3. `./build.sh`
+
+### Download Binary build by Github Action
+
+[Download Binary] https://github.com/sec-bit/mfer-safe/releases