Beautified FF's userChrome.css and hidden undesirable context menu items

firefox/.mozilla/firefox/userprofile/chrome/userChrome.css

@@ -1,33 +1,67 @@
+/*AGENT_SHEET*/
 
+#urlbar,
+#navigator-toolbox #searchbar {
+    border: none !important;
+}
 
-#urlbar, #navigator-toolbox #searchbar {border: none !important;}
-
-.titlebar-buttonbox-container, .titlebar-spacer {
-  display: none !important;
+.titlebar-buttonbox-container,
+.titlebar-spacer {
+    display: none !important;
 }
 
 #navigator-toolbox {
-  border: none !important;
+    border: none !important;
 }
 
-
 toolbox {
-  margin-top: 0px !important;
-  margin-bottom: -34px !important;
-  height: 0 !important;
-  pointer-events: none;
+    margin-top: 0px !important;
+    margin-bottom: -34px !important;
+    height: 0 !important;
+    pointer-events: none;
 }
-vbox {pointer-events: all;}
 
+vbox {
+    pointer-events: all;
+}
 
 #nav-bar {
-  z-index: 10;
-  opacity: 0;
-  pointer-events: none;
-  transition: transform, ease-in-out 0.2s, opacity 0.2s ease-in-out !important;
+    z-index: 10;
+    opacity: 0;
+    pointer-events: none;
+    transition: transform, ease-in-out 0.2s, opacity 0.2s ease-in-out !important;
 }
+
 /* All the states in which the URL bar is visible */
-vbox:hover ~ #nav-bar, toolbox:focus-within > #nav-bar, #nav-bar:hover, #mainPopupSet:hover ~ box #nav-bar, #mainPopupSet:focus-within ~ box #nav-bar {
-  opacity: 1;
-  pointer-events: all;
+
+vbox:hover~#nav-bar,
+toolbox:focus-within>#nav-bar,
+#nav-bar:hover,
+#mainPopupSet:hover~box #nav-bar,
+#mainPopupSet:focus-within~box #nav-bar {
+    opacity: 1;
+    pointer-events: all;
 }
+
+/* Hide undesirable default context menu items */
+/* Source: https://github.com/stonecrusher/simpleMenuWizard */
+
+#context-sendaudio,    /* Email Audio */
+#context-sendvideo,    /* Email Video */
+#context-sendimage,    /* Email Image */
+#context-sendpagetodevice,
+#context-sep-sendpagetodevice,
+#context-sendlinktodevice,
+#context-sep-sendlinktodevice,
+#context_sendTabToDevice,
+#context_sendTabToDevice_separator,
+#context-print-selection, /* Print Selection                  */
+#context-searchselect,    /* Search [Google] for "[selected]" */
+#context-inspect-a11y,    /* Inspect Accessibility Properties */
+#context-bookmarklink,    /* Bookmark Link                    */
+
+#pageAction-panel-sendToDevice,
+#pageAction-panel-emailLink,    /* Email Link */
+
+#leave_this_dummy_here
+    { display: none !important; }