HTTP Version Indicator by Brandon Siegel

An indicator showing the HTTP version used to load the page in the address bar.

4.7 (32 reviews)

2,955 Users

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About this extension

This extension adds a useful indicator in the address bar showing which version of HTTP was used to fetch the page.

Developer comments

Development of the current (WebExtension) version of this addon is at: https://github.com/bsiegel/http-version-indicator

Development history of the legacy extension can be found at: https://github.com/chengsun/moz-spdy-indicator

Rated 4.7 by 32 reviewers

Release notes for 3.2.1

- Adds support for showing pages loaded over HTTP/3 (including actual protocol version) in Firefox 88+
- Adds support for showing pages loaded over HTTP 1.x versions
- "Partial" HTTP/2 state is no longer shown, since the addon now shows you the specific HTTP version used rather than simply whether the page was loaded over HTTP/2 or not.
- Updated the colored page action icons so that they will appear correctly when Firefox's dark theme is applied. HTTP/2 and SPDY are now both represented using the blue icon, and HTTP/3 is represented in green.

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