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Created attachment 8351660 [details] screenshot.png: Wireshark vs. Firefox Network Monitor User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0 (Beta/Release) Build ID: 20131205075310 Steps to reproduce: Open the Firefox’s Network Monitor, load a website using gzipped style sheets (e.g. http://www.htlwy.ac.at/homepage/index.php ). Actual results: The field “Content-Length” for the gz-file only contains the value of the uncompressed version of the style sheet. Expected results: I’d like to have either both displayed, like Wireshark does (see screenshot.png). Or, if it isn’t possible to get the compressed file size, it would be great if at least a hint for the user is added, that only the uncompressed size of the file is displayed. Since IE, Safari and Chrome display the same (wrong) value, I can’t tell if the webserver delivers a compressed file or not.
Thanks for the report! I hope we'll address this soon.