HTTP/2 and SPDY indicator

An indicator button for HTTP/2, SPDY and QUIC support by each website.

HTTP/2 and SPDY Indicator Chrome Extension

HTTP/2 and SPDY Indicator is a Chrome extension that displays a lightning icon in the address bar indicating whether a website supports HTTP/2, SPDY, or neither.

Extension stats

By: rauchg
Users: 70,000+
Rating: 4.69
(204)
Version: 1.0.0 (Last updated: 2016-03-11)
Creation date: 2016-03-11
Risk impact: Moderate risk impact
Risk likelihood:
Manifest version: 2
Permissions:
  • tabs
Size: 44.62K

Other platforms

Not available on Android
Not available on Firefox
Not available on Edge
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Extension summary

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

User reviews

Great. But how about showing HTTP/3 now that Chrome supports it?
by Brian Gregory, 2019-11-07

gives deprecation warning in recent chrome versions because it's using loadTimes. Nice ext though.
by Jakob Hirsch, 2019-03-21

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
by yu liu, 2018-10-31
View all user reviews

Extension safety

Risk impact

HTTP/2 and SPDY indicator requires a few sensitive permissions. Exercise caution before installing.

Risk likelihood

HTTP/2 and SPDY indicator may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

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Promo images

HTTP/2 and SPDY indicator small promo image
Small promo image

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