Firefox Quic



  • Mozillaは4月19日（米国時間）、デスクトップ向け「Firefox」の最新版「Firefox 88」を正式公開した。「Firefox 88」ではPDFファイルに埋め込まれた.
  • Go to Application Control profile, look for Application signature name 'QUIC' and select the action 'Block'. Apply this Application Control profile into the firewall policy. Method 3: Block QUIC using firewall policy Create a custom firewall service for UDP port 80 and port 443.
  • Apr 17, 2021 QUIC and HTTP/3 support is now appearing in Firefox Nightly and Beta build while it will begin its roll-out with the upcoming Firefox 88 stable release. HTTP/3 as the new HTTP protocol standard based on QUIC is beginning its roll-out in Firefox.

Nov 04, 2019 The new protocol, the successor to HTTP2 is developed by Google and will use UDP instead of TCP protocol to send HTTP requests, FYI, QUIC is the short form for “Quick UDP Internet Connections”.

tl;dr: Support for QUIC and HTTP/3 is now enabled by default in Firefox Nightly and Firefox Beta. We are planning to start rollout on the release in Firefox Stable Release 88. HTTP/3 will be available by default by the end of May.

What is HTTP/3?

HTTP/3 is a new version of HTTP (the protocol that powers the Web) that is based on QUIC. HTTP/3 has three main performance improvements over HTTP/2:

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Quic
  • Because it is based on UDP it takes less time to connect;
  • It does not have head of line blocking, where delays in delivering packets cause an entire connection to be delayed; and
  • It is better able to detect and repair packet loss.

Cloudflare Quic

QUIC also provides connection migration and other features that should improve performance and reliability. For more on QUIC, see this excellent blog post from Cloudflare.

How to use it?

Firefox Nightly and Firefox Beta will automatically try to use HTTP/3 if offered by the Web server (for instance, Google or Facebook). Web servers can indicate support by using the Alt-Svc response header or by advertising HTTP/3 support with a HTTPS DNS record. Both the client and server must support the same QUIC and HTTP/3 draft version to connect with each other. For example, Firefox currently supports drafts 27 to 32 of the specification, so the server must report support of one of these versions (e.g., “h3-32”) in Alt-Svc or HTTPS record for Firefox to try to use QUIC and HTTP/3 with that server. When visiting such a website, viewing the network request information in Dev Tools should show the Alt-Svc header, and also indicate that HTTP/3 was used.

Firefox Quick Keys

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Firefox Quic

About Dragana Damjanovic

Firefox quick links

Dragana is the networking module owner of Firefox. She is responsible for the Firefox’s implementation of HTTP, HTTP/3, HTTP/2, WebSockets, DNS, cache, etc.