User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0 When including an external javascript one should use the <script> tag. A tag without any inline content can be closed by itself <script /> instead of using the closing tag <script></script> When using external scripts, it is common to make the script tag self-closing. Since the new release of firefox3, external scripts with a self-closing script tag are loaded, nut not executed. Think this is a major backwards compatibility issue for lots of websites... Reproducible: Always Steps to Reproduce: 1.include an external script tag in the page 2.make the script tag close itsels (<script />) 3. Actual Results: Script is loaded, but not executed. Expected Results: script should be executed

Probably duplicate of bug 327796

I agreee that it must be a dupe of bug 327796 Please attach always a testcase or URL if you report something like this.