Bug 1718860 - Adds null check for button. r=emalysz

Differential Revision: https://phabricator.services.mozilla.com/D119032
2021-07-05 16:41:47 +00:00
parent 9f97269bc5
commit 76e9f0ae2f
1 changed files with 4 additions and 0 deletions
--- a/browser/components/customizableui/CustomizableWidgets.jsm
+++ b/browser/components/customizableui/CustomizableWidgets.jsm
@@ -497,6 +497,10 @@ if (!screenshotsDisabled) {
      let document = subj.document;
      let button = document.getElementById("screenshot-button");

+      if (!button) {
+        return;
+      }
+
      if (data == "true") {
        button.setAttribute("disabled", "true");
      } else {