updated install

README.MD

@@ -22,8 +22,8 @@ https://www.youtube.com/watch?v=RdV8DBW5b0g
 
 ## Install
 SingleFile can be installed:
- - on Firefox via the Firefox Add-ons website: https://addons.mozilla.org/en-US/firefox/addon/single-file,
- - on Chrome via the Chrome Web Store: https://chrome.google.com/extensions/detail/mpiodijhokgodhhofbcjdecpffjipkle,
+ - via the Firefox Add-ons website: https://addons.mozilla.org/en-US/firefox/addon/single-file,
+ - via the Chrome Web Store: https://chrome.google.com/extensions/detail/mpiodijhokgodhhofbcjdecpffjipkle,
  - by downloading the zip file (https://github.com/gildas-lormeau/SingleFile/archive/master.zip) and installing it manually.
 
 ## Getting started