I love using the add-on, Viewmakrs. It's one add-on I can't live without. Every time when I go to add a bookmark or Control-D, Firefox freezes up, and then gives me: Warning: Unresponsive script and I get one of these errors every time, even when I open a new Window: A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete. Script: chrome://viewmarks/content/model.js:28 Script: chrome://viewmarks/content/model.js:69 Script: chrome://viewmarks/content/capture.js:83 Script: chrome://viewmarks/content/capture.js:98 Script: chrome://viewmarks/content/data.js:128 Script: chrome://viewmarks/content/editmark.js:270 Then, once in a blue moon, I get this error, not from Viewmarks: Script: resource://gre/components/nsBlocklistService.js:771 TypeError: PlacesUtils.nodeIsLivemarkContainer is not a function Can anyone suggest a quick fix without disabling ViewMarks? I've written to the author of ViewMarks with no reply. Any assistance would be appreciated. Thank You. ps I've included my Troubleshooting information below, if this helps anyone.