> In the meantime, I launched the Chrome browser to test the internet speed on www.speedtest.net, unfortunately the result same with Firefox. (Firefox is still running currently) > > If Firefox is re-launch, then test again on Chrome will become normal situation. So we can realize that Firefox has hold on some bandwidths. > > Thanks in advance. Couldn't reproduce the issue on Ubuntu 20.04 with current Nightly. I'm not sure how to narrow down this issue. Perhaps a recording a profile using [Firefox Profiler](https://profiler.firefox.com/) could give more insights. Yan Hui: is it possible for you to record and upload such a profile?
Bug 1714023 Comment 10 Edit History
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> In the meantime, I launched the Chrome browser to test the internet speed on www.speedtest.net, unfortunately the result same with Firefox. (Firefox is still running currently) > > If Firefox is re-launch, then test again on Chrome will become normal situation. So we can realize that Firefox has hold on some bandwidths. > > Thanks in advance. Couldn't reproduce the issue on Ubuntu 20.04 with current Nightly. I'm not sure how to narrow down this issue. Perhaps recording a profile using [Firefox Profiler](https://profiler.firefox.com/) could give more insights. Yan Hui: is it possible for you to record and upload such a profile?