Updated few things in descriptions.txt (#1000)

* Updated few things

* minor correction

* minor grammatical mistake

doc/description/description.txt

@@ -10,7 +10,7 @@ Out of the box, uMatrix works in relax block-all/allow-exceptionally mode, meani
 
 * A single-click to whitelist/blacklist one or multiple classes of requests according to the destination and type of data (a blocked request will NEVER leave your browser).
 
-* Efficient blacklisting: cookies won't leave your browser, JavaScript won't execute, plugins won't play, tracking pixels won't download, etc.
+* Efficient blacklisting: cookies won't leave your browser, JavaScript won't execute, media won't play, tracking pixels won't download, etc.
 
 * You do not have to solely rely on just one particular curated blacklist (arguably with many missing entries) outside which nothing else can be blocked: You are in full control.
 
@@ -22,11 +22,11 @@ Out of the box, uMatrix works in relax block-all/allow-exceptionally mode, meani
 
 - type of requests (top row)
   * cookies
-  * CSS-related resources (stylesheets and web fonts)
+  * css (stylesheets and web fonts)
   * images
-  * plugins
+  * media
   * scripts
-  * XHR (requests made by scripts)
+  * xhr (requests made by scripts)
   * frames
   * others
 
@@ -56,7 +56,7 @@ Randomly assembled documentation: https://github.com/gorhill/uMatrix/wiki
 
 This extension is also useful to understand what the web page in your browser is doing, often without your knowledge. You have full ability to see and decide with whom a web page communicates, and to restrict these communications to specific classes of objects within the web page.
 
-The number which appear in the extension icon correspond to the total number of distinct requests attempted (successfully or not depending on whether these were allowed or blocked) by the web page.
+The number which appears in the extension icon correspond to the total number of distinct requests blocked by the extension.
 
 Simply click on the appropriate entry in the matrix in order to white-, black- or graylist a component. Graylisting means the blocked or allowed status will be inherited from another cell with higher precedence in the matrix.
 
@@ -74,7 +74,7 @@ This extension is also useful if you wish to speed up your browsing, by globally
 
 =====
 
-BUGS, ISSUES: https://github.com/gorhill/uMatrix/issues
+BUGS, ISSUES: https://github.com/uBlockOrigin/uMatrix-issues/issues
 
 SOURCE CODE: https://github.com/gorhill/uMatrix (GPLv3)