Update icecat.md

Author: ivan-hc

apps/icecat.md

@@ -4,9 +4,13 @@
 
  Its main advantage is an ethical one: it is entirely free software. While the Firefox source code from the Mozilla project is free software, they distribute and recommend nonfree software as plug-ins and addons. Also their trademark license imposes requirements for the distribution of modified versions that make it inconvenient to exercise freedom 3.
 
+ This is the portable official version converted to an AppImage by our team, "Portable Linux Apps" , no additional changes have been made.
+ 
  SITE: https://www.gnu.org/software/gnuzilla
 
  SOURCE: https://icecatbrowser.org
 
+ APPIMAGE: https://github.com/Portable-Linux-Apps/IceCat-AppImage
+
  | [Applications](https://portable-linux-apps.github.io/apps.html) | [Home](https://portable-linux-apps.github.io)
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