Merge branch 'master' into photon-style

CREDITS

@@ -77,6 +77,9 @@ N: 7k5x
 E: 7k5xlp0onfire@gmail.com
 W: https://github.com/7k5x
 
+N: badprogramshere
+W: https://github.com/badprogramshere
+
 N: Burak Yigit Kaya
 E: ben@byk.im
 W: https://byk.im/

userChrome.css

@@ -185,7 +185,7 @@
   }
 
   /* Scroll Button - Size Fix */
-  :root:not([uidensity=touch]) #tabbrowser-arrowscrollbox {
+  :root #tabbrowser-arrowscrollbox {
     --scrollbtn-vertical-padding: 3px;
     --scrollbtn-vertical-border:  2px;
     --scrollbtn-border-radius:    7px;
@@ -338,6 +338,14 @@
     margin-bottom: 0px !important;
   }
 
+  /* Remove line at Toolbar's top */
+  #tabbrowser-tabs {
+    z-index: 1 !important;
+  }
+  #tabbrowser-arrowscrollbox[overflowing] .tabbrowser-tab[pinned]:is([visuallyselected], [multiselected]) {
+    overflow: hidden;
+  }
+
   /** Selected Tab - Color like toolbar ***************************************/
   :root:not(:-moz-lwtheme) {
     /* Fix for windows's system default theme. Using --toolbar-bgcolor fallback */