+/- update readme

README.md

@@ -1,13 +1,29 @@
 # Get to know the LGBTQIA+ community
 
 This extension will change the page for a new tab / new page in _Google Chrome_ (version >= 88). It uses
-the [Manifest V3](https://developer.chrome.com/docs/extensions/mv3/intro/).
+the [Manifest V3](https://developer.chrome.com/docs/extensions/mv3/intro/). Does not work for Smartphones.
 
 Every tab/window (`chrome://newtab/`) will generate a random queer information page, so you maybe a page appears, you'll
 already knew and maybe not. Kinda fun, huh?
 
 ![Screenshot for the extension](images/screenshots/screenshot-new-tab.png)
 
+## Installation
+
+Currently this extension is not available in the Chrome Webstore. But will soon.
+
+In the mean time you can add it manually to chrome. That means, you have to download it first. Go
+to [Releases](https://github.com/stephfuchs/queer-custom-chrome-tab/releases) and download the latest version to your
+Computer.
+
+1. Open the Extension Management page by navigating to `chrome://extensions`. The Extension Management page can also be
+   opened by clicking on the Chrome menu, hovering over **More Tools** then selecting **Extensions**.
+1. Enable Developer Mode by clicking the toggle switch next to **Developer mode**.
+1. Click the **LOAD UNPACKED** button and select the extension directory.
+
+That's it. You can now open a new tab or new window. There will be a popup which asks you whether you want to replace
+the template. Just choose "yes" and it will update.
+
 ## Content
 
 This content is a result of researches. All sources will be noticed, so you can inform yourself, if you want to.