What causes the aborted or canceled status in the browser console?

Question

Software testing

It does not always go to the eleon-nn.ru/katalog/kabel-i-provod/kabel-silovoy page from the main one. In the browser console it displays the status of the page "canceled" (aborted in firebug), in the hosting logs there is an error 499

Answer 1

I was unable to reproduce the error in my browser.
Try How to get around nginx error 499? but not sure if it will help.