Removed uMatrix (closes #287)

CONTRIBUTORS.md

@@ -60,6 +60,7 @@ GitHub:
 - [@mceachen](https://github.com/mceachen)
 - [@adam-sroka](https://github.com/adam-sroka)
 - [@m0yP](https://github.com/m0yP)
+- [@freddy-m](https://github.com/freddy-m)
 
 Reddit:
 

yaml/browserExtensions.yml

@@ -86,10 +86,6 @@
   url: https://addons.mozilla.org/en-US/firefox/addon/temporary-containers
   text: |
     Open tabs, websites, and links in automatically managed disposable containers. Containers isolate data websites store (cookies, storage, and more) from each other, enhancing your privacy and security while you browse.
-- name: uMatrix
-  url: https://addons.mozilla.org/en-US/firefox/addon/umatrix
-  text: |
-    Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.
 - name: TrackMeNot
   url: https://addons.mozilla.org/en-US/firefox/addon/trackmenot
   text: |