Add instructions for Edge (Edge compatibility comes for free apparently)

Author: MartinGleize

README.md

@@ -1,5 +1,5 @@
 # Wikifier
-With this Chrome/Firefox extension, search the currently browsed wiki for any selected text.
+With this browser extension, search the currently browsed wiki for any selected text. Compatible with Chrome, Firefox, and Edge.
 
 If your selected text has an exact page on the wiki, the Wikifier brings you directly to it. This is very convenient, since every interesting term on a page is not necessarily "wikilinked" (even when it might have a relevant page).
 
@@ -13,6 +13,10 @@ https://chrome.google.com/webstore/detail/wikifier/halpmadjihbhgidkaiikhieggmhjh
 
 [coming]
 
+* From the Microsoft Edge Add-ons:
+
+[coming]
+
 # Using Wikifier
 
 On supported sites (wikipedia.org, wikia.com, fandom.com), just highlight text you want to search, right-click (this opens the context menu) and click on "Search this wiki for [your selection]".
@@ -40,6 +44,15 @@ For unpacked loading, the simplest is to clone or to download the ZIP file of th
 1. Type `"about:debugging#/runtime/this-firefox"` in the URL bar.
 1. Click on "Load Temporary Add-on..." and target the Wikifier folder.
 
+## Installation on Edge (unpacked)
+
+1. Download and extract the Wikifier folder.
+1. Copy `"manifest_chrome.json"` to `"manifest.json"`.
+1. Open Microsoft Edge.
+1. Type `"edge://extensions/"` in the URL bar.
+1. Enable "Developer mode" in the bottom left.
+1. Click on "Load unpacked" and target the Wikifier folder.
+
 # License
 
 MIT License.