File upload error

For the past two days I have not been able to get any files to upload to the forum. All the files I have tried are JPG extensions. I have tried the insert file method and I have tried the attach file method. I have tried files that have uploaded in the past as a test for file corruption, but I constantly get an upload failure.

For this post I event tried a GIF file but also got an upload failure.

While making another post in which I needed to include a screen capture image I could still not get the image uploaded. The failed uploads occur when using Firefox. Today I then tried Chrome. I was unable to use the insert image feature with Chrome because it did not give me a choice of selecting the upload from my computer. Only an upload from a URL was possible. But I could upload the image by clicking the "Advanced" button and using the "Attachments" link. The upload was finally successful using Chrome.