diff options
| -rw-r--r-- | browser/components/sessionstore/content/aboutSessionRestore.js | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/browser/components/sessionstore/content/aboutSessionRestore.js b/browser/components/sessionstore/content/aboutSessionRestore.js index 8a9410aa8..8f265235d 100644 --- a/browser/components/sessionstore/content/aboutSessionRestore.js +++ b/browser/components/sessionstore/content/aboutSessionRestore.js @@ -188,6 +188,9 @@ function onListClick(aEvent) { if (aEvent.button == 2) return; + if (!treeView.treeBox) { + return; + } var cell = treeView.treeBox.getCellAt(aEvent.clientX, aEvent.clientY); if (cell.col) { // Restore this specific tab in the same window for middle/double/accel clicking @@ -286,7 +289,9 @@ var treeView = { get rowCount() { return gTreeData.length; }, setTree: function(treeBox) { this.treeBox = treeBox; }, getCellText: function(idx, column) { return gTreeData[idx].label; }, - isContainer: function(idx) { return "open" in gTreeData[idx]; }, + isContainer: function(idx) { + return gTreeData[idx] ? "open" in gTreeData[idx] : false; + }, getCellValue: function(idx, column){ return gTreeData[idx].checked; }, isContainerOpen: function(idx) { return gTreeData[idx].open; }, isContainerEmpty: function(idx) { return false; }, |