chore: Bump release version, b=no-bug, c=common

src/zen/common/styles/zen-panel-ui.css

@@ -33,6 +33,9 @@ panel[type="arrow"]:not(#feature-callout) {
     &[followanchor="false"] {
       appearance: auto !important;
       -moz-default-appearance: menupopup;
+      /* We set the default background here, rather than on ::part(content),
+       * because otherwise it'd interfere with the native look. Non-native-looking
+       * popups should get their background via --panel-background */
       background-color: Menu !important;
     }
 

surfer.json

@@ -20,7 +20,7 @@
       "brandShortName": "Zen",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.18.10b",
+        "displayVersion": "1.19b",
         "github": {
           "repo": "zen-browser/desktop"
         },