Bug 1057127 - "[a11y] Improve accessibility of output area for screen readers". r=bgrinstead

browser/devtools/webconsole/console-output.js

@@ -488,6 +488,11 @@ Messages.BaseMessage.prototype = {
     let container = doc.createElementNS(XHTML_NS, "div");
     container.id = "console-msg-" + gSequenceId();
     container.className = "message";
+    if (this.category == "input") {
+      // Assistive technology tools shouldn't echo input to the user,
+      // as the user knows what they've just typed.
+      container.setAttribute("aria-live", "off");
+    }
     container.category = this._categoryCompat;
     container.severity = this._severityCompat;
     container.setAttribute("category", this._categoryNameCompat);

browser/devtools/webconsole/webconsole.xul

@@ -174,7 +174,8 @@ function goUpdateConsoleCommands() {
       </toolbar>
 
       <hbox id="output-wrapper" flex="1" context="output-contextmenu" tooltip="aHTMLTooltip">
-        <div xmlns="http://www.w3.org/1999/xhtml" id="output-container" tabindex="1" />
+        <div xmlns="http://www.w3.org/1999/xhtml" id="output-container"
+             tabindex="0" role="document" aria-live="polite" />
       </hbox>
       <notificationbox id="webconsole-notificationbox">
         <hbox class="jsterm-input-container" style="direction:ltr">