Why jquery uploadify fails to upload files in Firefox

The reason why jquery uploadify fails to upload files in Firefox:

The reason why uploadify cannot be uploaded in Firefox is that flash cannot read the session. If there is session authentication in the background, such as whether the user is logged on, the upload fails. However, the upload is successful under ie Because Adobe Flash can read IE (speechless). You can solve the problem by yourself.
Solution

See the aboveCodeThe principle is very simple, that is, to determine whether the browser is an Internet Explorer. If so,
The server reads the cookie value in a normal way. Otherwise, the server uses the client js method
The cookie is obtained and then transmitted to the server through the URL.