From e6e0cbc387c2a77b48e4065c229daa65bf1aa0fa Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Wed, 19 Apr 2017 01:12:16 +0200
Subject: [PATCH] don't fail hard when getImageData is not allowed

---
 src/chromeBadge.ts | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/chromeBadge.ts b/src/chromeBadge.ts
index df12fba83..369a95227 100644
--- a/src/chromeBadge.ts
+++ b/src/chromeBadge.ts
@@ -150,11 +150,16 @@ export class ChromeBadge implements Badge {
 
     // Allow running outside the extension for testing
     if (window["chrome"] && window.chrome["browserAction"]) {
-      let imageData = this.ctx.getImageData(0,
-                                            0,
-                                            this.canvas.width,
-                                            this.canvas.height);
-      chrome.browserAction.setIcon({imageData});
+      try {
+        let imageData = this.ctx.getImageData(0,
+                                              0,
+                                              this.canvas.width,
+                                              this.canvas.height);
+        chrome.browserAction.setIcon({imageData});
+      } catch (e) {
+        // Might fail if browser has over-eager canvas fingerprinting countermeasures.
+        // There's nothing we can do then ...
+      }
     }
   }