FF clear recent history has a ''buisy script'' message
Recently, whenever I go to clear recent history, FF 10.0.2, there is a significant pause and then a '' ... busy script ... '' message "chrome://browser/content/sanitize.js:135 ". Stop script option then allows clear history to run to completion.
To the best of my knowledge I do not have Google Chrome. What does this message mean? How do I get rid of the minor annoyance?