From 9ee75644b96d8532c54ce81dbe17265cfafb66fa Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Sat, 22 Jul 2017 01:59:19 +0200
Subject: [PATCH] Align ToolbarIconColor luminance computation with UWP
 guideline as well to make it consistent with the rest of the browser.

---
 browser/base/content/browser.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index bbfef0049b..a8aff1bd7b 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -8144,12 +8144,12 @@ var ToolbarIconColor = {
     let luminances = new Map;
     for (let toolbar of document.querySelectorAll(toolbarSelector)) {
       let [r, g, b] = parseRGB(getComputedStyle(toolbar).color);
-      let luminance = 0.2125 * r + 0.7154 * g + 0.0721 * b;
+      let luminance = (2 * r + 5 * g + b) / 8;
       luminances.set(toolbar, luminance);
     }
 
     for (let [toolbar, luminance] of luminances) {
-      if (luminance <= 110)
+      if (luminance <= 128)
         toolbar.removeAttribute("brighttext");
       else
         toolbar.setAttribute("brighttext", "true");