Debian Jessie with Firefox 47.0.1 from Mozilla Debian Team. Firefox uses "automatic cache management", which is default. The problem showed up just recently.
Today for a test sake I streamed a movie https://archive.org/details/ SoylentGreen1973. The size of MPEG4 file is 919.8 MB. All apps, which potentially could use Internet, were shutdown. I'm on wired connection to my router, Wi-Fi disabled on laptop physically - switch turned off. After movie completed I found the following in gkrellm, which monitors my network traffic: Received: 6.302 GB (vs. 919.8 MB original movie size ?!!!) Transmitted: 138.43 MB Total: 6.440 GB Then I streamed the same movie in Google Chrome and after completed found this in gkrellm: Received: 7.345-6.302 = 1.043 GB (~~ equal original movie size) Transmitted: 146.93-138.43 = 8.5 GB Total: 7.491-6.440 = 1.051 GB No wonder in last 10 days internet usage with my ISP rocketed up. Anybody knows what is going on? Why streaming HTML5 video (I've not tried flash yet from the same source) in Firefox downloads data over 6 times the size of original movie? I never experienced anything similar before neither with Firefox nor any other browser. Thanks.
