Caroline, Thanks for your issue report.
If you get this error again, offering to download a .php could you download the .php and attach it to this issue report. Dave ** Changed in: firefox (Ubuntu) Status: Unconfirmed => Needs Info -- Firefox tries to open URLs ending in .dll with wine https://launchpad.net/bugs/55825 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs