Firefox SPDY + WS
SPDY/WebSocket on Gecko
Agenda
- WebSocket on Gecko
- SPDY on Gecko
- Telemetry for SPDY
WebSocket on Gecko
WebSocket on Gecko
First support for desktop is Firefox 4
Mobile (Android) is from Firefox 7
Unprefxed is Firefox 11
To enable/disable, use network.websockets.enable on about:config
WebSocket version
Version 76 ... Firefox 4 (2011/3)
Version 7 ... Firefox 6 (2011/8)
Version 10 ... Firefox 7 (2011/9)
RFC 6455... Firefox 11 (2012/3)
Outgoing Message Size on WS
Firefox 10 or older .. 16MB
Firefox 11 or later .. 2GB (depend on available memory)
Firefox 11
Unprefixed and RFC 6455 support
ArrayBuffer support
SPDY on Gecko
SPDY v2
First support is Firefox 11 (Desktop and Mobile)
But, default is OFF on 11 and 12
Enabled as default by Firefox 13 (2012/6)
To enable/disable, use network.http.spdy.enabled on about:config (SPDY v2 and SPDY v3)
SPDY v3
First support is Firefox 15 (Desktop and Mobile) (2012/08)
Ready on both ESR channel and Release channel
Of course, ready on Firefox OS
For internal test and addons
We provide a response header for SPDY
To detect SPDY session, simply watch "X-Firefox-Spdy" header
SPDY headers by Inspector
SPDY headers by Inspector
Limitation of SPDY impl. on Gecko
- v2 impelemtation is limited (ex. go away on failure case)
- NOT support client certificate authentication
- NOT support server push
- SSL false start is OFF
Telemetry for SPDY
Performance Data?
We don't have enough resource to testing
(Microsoft's lab)
Data collection
Firefox collects several data on REAL usages
TestPlot for UX
HelthReport for diagnostics
Telemetry for researh of performance
What data does Mozilla collect by Telemetry?
http://mxr.mozilla.org/mozilla-central/source/toolkit/components/telemetry/Histograms.json
My telemetry data?
via about:telemetry (Firefox 19+) or about:telemetry addons
about:telemetry
Ex. SPDY_REQUEST_PER_CONN
Ex. SPDY_VERSION2
2013/02/01 vs 2013/03/01
