Comment 3 for bug 941343

qBittorrent 2.9.3+ (tried 2.9.5 as well)
OS: Windows 7 Enterprise x86_64 (no SP1)
Firefox: 10.0.x

qBittorrent was built from source on OpenSuSE 12.1 x86_64 with --disable-gui option and has SSL enabled.

Here's more details:

Request:
GET {skipped}:8080
Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding gzip, deflate
Accept-Language en-gb,en;q=0.5
Connection keep-alive
Cookie filters_width=120; properties_height=274
Host {skipped}:8080
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2

Response:
400 Bad Request

(as text shown in the browser)
HTTP/1.1 401 Unauthorized
WWW-Authenticate: Digest realm="Web UI Access", nonce="{stripped}", opaque="{stripped}", stale="false", algorithm="MD5", qop="auth"

The same worked okay with Firefox 9.0.x