Details have been released about several vulnerabilities in Mozilla Firefox. These can potentially be exploited to detect the presence of local files, cause a DoS (Denial of Service), disclose sensitive information, spoof the file download dialog, and gain escalated privileges.

1) Web sites may include images from local resources, which can be exploited to determine the existence of local images, cause a DoS by referencing device files (e.g. "/dev/tty0"), and potentially steal passwords from Windows systems via file shares.

2) The file download dialog box truncates filenames, which potentially can be exploited to spoof file extensions in the file download dialog.

This is a variant of:
SA10760

3) On Mac OS X, Firefox is installed with world-writable permissions, which potentially can be exploited by malicious, local users to gain escalated privileges.

Solution
Update to version 1.0.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Wolfgang Schwarz
2) Gabriel Cabillón

Original Advisory
1) https://bugzilla.mozilla.org/show_bug.cgi?id=69070
2) https://bugzilla.mozilla.org/show_bug.cgi?id=234416
3) https://bugzilla.mozilla.org/show_bug.cgi?id=261527

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers