From 54b5fa04f20f8f273c29f82e31f4c153196efbf8 Mon Sep 17 00:00:00 2001
From: Kris Maglione <maglione.k@gmail.com>
Date: Wed, 19 Feb 2014 19:55:04 -0800
Subject: [PATCH] Stop unexpectedly going into INSERT mode on Facebook.

---
 common/content/events.js | 30 +++++++++++++++++-------------
 common/modules/base.jsm  | 11 ++++++++---
 2 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/common/content/events.js b/common/content/events.js
index 7d4fae56..3ae757c9 100644
--- a/common/content/events.js
+++ b/common/content/events.js
@@ -875,19 +875,23 @@ var Events = Module("events", {
             let haveInput = modes.stack.some(m => m.main.input);
 
             if (DOM(elem || win).isEditable) {
-                if (!haveInput)
-                    if (!isinstance(modes.main, [modes.INPUT, modes.TEXT_EDIT, modes.VISUAL]))
-                        if (options["insertmode"])
-                            modes.push(modes.INSERT);
-                        else {
-                            modes.push(modes.TEXT_EDIT);
-                            if (elem.selectionEnd - elem.selectionStart > 0)
-                                modes.push(modes.VISUAL);
-                        }
+                let e = elem || win;
+                if (!(e instanceof Ci.nsIDOMWindow &&
+                        DOM(e.document.activeElement).style.MozUserModify != "read-write")) {
+                    if (!haveInput)
+                        if (!isinstance(modes.main, [modes.INPUT, modes.TEXT_EDIT, modes.VISUAL]))
+                            if (options["insertmode"])
+                                modes.push(modes.INSERT);
+                            else {
+                                modes.push(modes.TEXT_EDIT);
+                                if (elem.selectionEnd - elem.selectionStart > 0)
+                                    modes.push(modes.VISUAL);
+                            }
 
-                if (hasHTMLDocument(win))
-                    buffer.lastInputField = elem || win;
-                return;
+                    if (hasHTMLDocument(win))
+                        buffer.lastInputField = elem || win;
+                    return;
+                }
             }
 
             if (elem && Events.isInputElement(elem)) {
@@ -969,7 +973,7 @@ var Events = Module("events", {
     },
 
     isInputElement: function isInputElement(elem) {
-        return DOM(elem).isEditable ||
+        return elem instanceof Ci.nsIDOMElement && DOM(elem).isEditable ||
                isinstance(elem, [Ci.nsIDOMHTMLEmbedElement,
                                  Ci.nsIDOMHTMLObjectElement,
                                  Ci.nsIDOMHTMLSelectElement]);
diff --git a/common/modules/base.jsm b/common/modules/base.jsm
index add25aec..e71407cb 100644
--- a/common/modules/base.jsm
+++ b/common/modules/base.jsm
@@ -977,9 +977,14 @@ Class.prototype = {
                 callback.call(this);
             }
             catch (e) {
-                util.dump("Error invoking timer callback registered at " +
-                          [frame.filename, frame.lineNumber, ""].join(":"));
-                Cu.reportError(e);
+                try {
+                    util.dump("Error invoking timer callback registered at " +
+                              [frame.filename, frame.lineNumber, ""].join(":"));
+                    util.reportError(e);
+                }
+                catch (e) {
+                    Cu.reportError(e);
+                }
             }
         };
         let frame = Components.stack.caller;