Poll temp files in <C-i> so I don't have to be edgy every time I quit the editor.

common/content/buffer.js

@@ -1037,9 +1037,12 @@ const Buffer = Module("buffer", {
                         this.file = io.createTempFile();
                         this.file.write(this.docShell.document.body.textContent);
                     }
+                    try {
                         this.callback(this.file);
+                    } finally {
                         this.file.remove(false);
                     }
+                }
                 finally {
                     this.destroy();
                 }

common/content/editor.js

@@ -348,21 +348,23 @@ const Editor = Module("editor", {
                     tmpBg = "yellow";
                     textBox.style.backgroundColor = "#bbbbbb";
                 }
+                else
+                    var editor = GetCurrentEditor();
 
                 if (!tmpfile.write(text))
                     throw Error("Input contains characters not valid in the current " +
                                 "file encoding");
 
-                this.editFileExternally(tmpfile.path);
+                let lastUpdate = Date.now();
-
+                function update(force) {
-                if (textBox)
+                    if (force !== true && tmpfile.lastModifiedTime <= lastUpdate)
-                    textBox.removeAttribute("readonly");
+                        return;
+                    lastUpdate = Date.now();
 
                     let val = tmpfile.read();
                     if (textBox)
                         textBox.value = val;
                     else {
-                    let editor = GetCurrentEditor();
                         let wholeDocRange = editor.document.createRange();
                         let rootNode = editor.rootElement.QueryInterface(Ci.nsIDOMNode);
                         wholeDocRange.selectNodeContents(rootNode);
@@ -370,6 +372,21 @@ const Editor = Module("editor", {
                         editor.selection.deleteFromDocument();
                         editor.insertText(val);
                     }
+                }
+
+                let timer = services.create("timer");
+                timer.initWithCallback({ notify: update }, 100, timer.TYPE_REPEATING_SLACK);
+
+                try {
+                    this.editFileExternally(tmpfile.path);
+                } finally {
+                    timer.cancel();
+                }
+
+                update(true);
+                if (textBox)
+                    textBox.removeAttribute("readonly");
+
             }, this);
             if (res == false)
                 throw Error("Couldn't create temporary file");