Definitely the 'Buzzz' around here, first reported by Susann. For the problem description and the work-around until it gets officially fixed, see the full forum topic Firefox 3.0.9 crashes when I *View Page Source*.

To go right to the work-around see Work-around for Firefox 3.0.9 crashes when I *View Page Source*

Or read on ....The problem is an incompatibility between the HTML Tidy Firefox extension and Firefox DOM. For right now it looks like simply modifying the HTML Tidy options to deselect the Highlight Lines With Errors[/strong> "fixes" the problem.