Comment 143 for bug 235200

I found further data, I am uncertain of the upload status. However, all related download bugs included are fixed.

I have downloaded a very large number of 4.7GB by HTTP in firefox files since this release.
However, my biggest uploads have never hit the 4GB limit yet.

I get mixed reports on upload. There may or may not be remaining issues with upload. The standard workaround is to use an external program for file-specific transfers when handling uploads over 4GB. However, this isn't nearly as easy on forms.

Many server advanced server software has limitations of 2GB or 4GB. This usually isn't related to the HTTP server software itself, but the additional programs and libraries used by the PHP or other CGI .

Since many servers don't support the upload of large files by HTTP, this could be an issue. You need to verify that it can function.

Here is an outline for test of verification of presence of bug.
1. Set up on your controlled home network, loopback device, or VM, an HTTP server verified to handle large files that does not utilize external programs for any file transfer handling.

2. Set it up to have a Forms based page that simply tells the server to upload the specific file from the client without having any external programs handle the file. (External programs may handle the filename and forms to process them and relay them back to the server.)

3. Try to upload of large file to said local server utilizing Firefox.

4. Check the file in directory of server, to see if it uploaded properly.