Update 'README.md'

README.md

@@ -9,4 +9,12 @@ This project uses [PNPM](https://pnpm.io/) for package management.
 How to Install
 ==============
 
-## To be added
+## Chromium
+- [Download](https://git.coom.tech/araragi/JKCS/archive/master.zip) this repo and extract it somewhere
+- Type `chrome://extensions` in your address bar
+- Enable **Developer Mode**
+- Click on **Load Unpacked**
+- Select the `chrome` folder from the zip you extracted earlier.
+
+## Firefox
+The Firefox extension is currently unsigned, which means you'll have to go into `about:config` and set `xpinstall.signatures.required` to false, then you can install the extension from the .xpi file in this repo like you normally would.