HTTP/2 and SPDY indicator
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This extension is no longer available in the official store. Delisted on 2025-09-17.
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An indicator button for HTTP/2, SPDY and QUIC support by each website.
HTTP/2 (based on Google's SPDY) makes the information exchange between browser and server significantly more performant. Websites and applications that upgrade their infrastructure to support them are at a clear advantage.
This extension shows a lightning icon in the address bar that's blue if the page is HTTP/2 enabled, green if the page is SPDY enabled, and gray if neither is available.
Currently it leverages the browser API for determining this, which relies on the protocol used for the initial page request.
**NEW in 1.0.0: support for latest Chrome, performance improvements, better icons!**
**NEW in 0.7.1: title and description improvements"**
**NEW in 0.7.0: added SPDY/5a1 support"**
**NEW in 0.6.0: added HTTP/2 icon [MATSUU Takuto]"**
**NEW in 0.5.0: added SPDY3.1 icon [MATSUU Takuto]"**
**NEW in 0.4.0: fix SPDY2 icon and added QUIC! [MATSUU Takuto]"**
**NEW in 0.3.0: version numbers for SPDY 2 and 3 in the icon [MATSUU Takuto]**
**NEW in 0.2.0: option to disable gray icon when SPDY is not enabled**
Latest reviews
Great. But how about showing HTTP/3 now that Chrome supports it?
gives deprecation warning in recent chrome versions because it's using loadTimes. Nice ext though.
why i cannot see the red color, even when i open google and youtube? I have enable QUIC in my chrome. it always shows the blue color with http2 enabled. but i didn't find quic session
It'f fune, but unfortunately is doesn't work for one of my IDN domains.
[Deprecation] chrome.loadTimes() is deprecated, instead use standardized API: nextHopProtocol in Navigation Timing 2. https://www.chromestatus.com/features/5637885046816768. (anonymous) @ content.js:4
please fix the load times issue
Still works fine, but started throwing deprecated error in Chrome's console: [Deprecation] chrome.loadTimes() is deprecated, instead use standardized API: nextHopProtocol in Navigation Timing 2
content.js:5 [Deprecation] chrome.loadTimes() is deprecated, instead use standardized API: nextHopProtocol in Navigation Timing 2. https://www.chromestatus.com/features/5637885046816768. has a waring in latest chrome, can you update it ？
nice extension. works properly!
gj
Very nice and handy extension. Highly recommended to check whether your connection to a particular server is on which type of protocol.
Very useful
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very goold
really handy stuff.
Please prepare Apple Safari!
Vivaldiも対応してた！
Fantastic!
Wonderful extension!
blue icon on dark theme doesn't look good
Great tool, but latest update was not cool. A tiny icon in address bar is better (and less clutter-y) than a huge button.
superb
Thank you!
put icon back to address bar!!!!!!!!
Very nice except that clicking the icon is now broken for HTTP2/SPDY as the name has changed in chrome.
Simply works
Thank you.
