- 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.

- 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.
- Removed the colored page action icons. The new Firefox UI refresh applies a grayscale filter over page action icons so they are no longer distinguishable by color. The icon's tooltip still indicates the HTTP version.

- Removed unnecessary content_scripts entry from the manifest which should reduce the required permissions.
- Added new localizations to Japanese, Turkish, and Russian (thanks contributors!)

- Rewrite of the addon as a WebExtension.
- Refreshed icon & removed references to SPDY (it was removed from Firefox in v51). The detection code is still there, users of Firefox 48-50 will still see the SPDY protocol version when browsing a website served over SPDY.