Problem with some files stuck at -100% processing-

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EDIT: Update

I used a clean install (without extensions or plugins) of Chrome to upload the file and it worked, there might be an extension in firefox blocking or messing with the file processing now.
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Hi

My internet connection is quite poor and I have been trying to upload a new model for the past month, but whenever I try to upload the largest zip file with the textures (around 40 MB) it gets stuck at "100% Processing... " every time, I thought it would be mostly because of my bad internet connection but I'm able to upload large files to google drive and cubebrush without problems.

Is there a way to upload files from or through dropbox or google drive?.

Cheers
._Glen