Update README.md w/ install instructions

README.md

@@ -12,8 +12,19 @@ A fairly simple. context menu based extension to encode/decode base64 strings.
 ## Screenshots
 ![Context Menu Screenshot](/Screenshots/ContextMenu.jpg)
 
+## How to install (until it's published)
+1. [Download the latest release](https://github.com/NellyWhadsDev/inline-base64-tools/releases)
+2. Unzip the file
+3. Open Google Chrome
+4. Open `Settings` -> `Extensions`
+5. Enable developer mode
+6. Click `Load unpacked`
+7. Select the `ext` directory wherever you unzipped the release
+8. Profit(?)
+
 ## How to use
-1. [Install unpacked extension](https://webkul.com/blog/how-to-install-the-unpacked-extension-in-chrome/) (currently awaiting publishing)
+1. Install the extension as above (currently awaiting publishing)
+2. You may need to refresh the target webpage
 2. Select text to encode/decode
 3. `Right click` -> `Inline Base64 Tools` -> `Encode`/`Decode`