Find the bug report that you want to edit.
Click on the Add an Attachment link to view the Create New Attachment page.
Complete the Create New Attachment form.
File: Click the Browse button and select the file you want to attach.
Description: Enter a short descriptive name for the file.
Content Type: Check the auto-detect radio button
Obsoletes: (optional) Check each existing attachment that you want to delete.
Comment: (optional) Add a comment about the attachment to the bug.
Click the Submit button.