Low internet speed via Firefox.
Home Internet speed via cable 500 Mbps. When checking the Internet speed through the Firefox browser (version 133.0.3), incoming and outgoing about 250 Mbps. That is, the browser cuts the speed twice. When checking the speed through Google Chrome (version 145.0.7632.160), the Internet speed is about the declared 500 Mbps. Please help solve the problem with Internet speed through the Firefox browser.
Alle Antworten (7)
Please confirm that this bug exists in the most recent version (148.0.2).
Try to enter about:config in the address bar and set network.http.http3.enable to false
Optionally set network.http.http2.send-buffer-size to 33554432
Then restart the browser.
Geändert am von TyDraniu
We’ve been actively working on improving HTTP/3 upload performance over the past year. This includes optimizations such as fast UDP handling and reducing spurious retransmissions.
To better understand the performance gap, we built a benchmarking framework with a simulated network environment to measure upload for both Firefox and Chrome under controlled conditions.
In a 300 Mbps bandwidth / 40 ms RTT scenario:
- Chrome upload: ~190 Mbps
- Firefox upload: ~150 Mbps
These results show that there is still room for improvement, and we will continue working on closing the gap. However, they also indicate that Firefox is not two times slower than Chrome, as originally reported in this bug.
With Neqo release v0.22.0 that will land in version 149.0 we improved HTTP/3 upload performance for connections that see spurious losses, e.g. because of packet-reordering. We see about 11% of connections experiencing some degree of this in desktop telemetry and could see up to 2x upload throughput in local measurements and benchmarks, depending on the severity of packet-reordering. This is a win for upload stability and robustness.
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