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Siduction Forum => Software - Support => Software Support (EN) => Topic started by: ajavibp on 2020/06/21, 11:50:59

Title: Low speed in Firefox
Post by: ajavibp on 2020/06/21, 11:50:59
Hello, lately I have noticed a lack of speed in firefox and I have found something curious. The same speed test gives me half the speed in firefox than in chromium. I have moved the user folder to start a clean session, but with the same result. I downloaded an ISO from Ubuntu with wget and the real speed is the one that marks chromium.Someone else happens?Firefox v 77.0-1 from the debian repository.
Thanks!
Title: Re: Low speed in Firefox
Post by: dibl on 2020/06/21, 16:33:06
That's such an odd problem, I repeated your experiment to see how they behave here. I have the same Firefox ver. 77, and I use SRWare Iron ver. 81.0.4200.0. Here are the results:

FF                                               Iron

Down -- 52.07                             Down -- 54.59
Up      -- 11.78                              Up     -- 11.98


Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/21, 16:49:38
Thanks for your answer. I will have to continue checking, the bad thing is that I do not know very well what to check.
Title: Re: Low speed in Firefox
Post by: dibl on 2020/06/21, 17:46:16
You might want to study the dependencies of Firefox, and see whether there is reason to be suspicious about one of them.  Or, maybe remove/purge Firefox and all of its dependencies, rename the user config files related to Firefox, and try a new installation.

If you have access to a second hardware system on the same router, it would also be interesting to know whether Firefox is a problem on that one also.  Even if it were a windows system, you could boot a Linux live USB stick with Firefox on it, and test it that way.

If you are using a laptop, it might be interesting to go find an open wifi spot and try through a different router.

Just some ideas for you.
Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/21, 17:50:05
I'll try. Thanks!
Title: Re: Low speed in Firefox
Post by: axt on 2020/06/21, 19:31:11
Quote from: dibl
That's such an odd problem

More likely an add-on problem.

Quote
remove/purge Firefox (...) and try a new installation

And I thought we were here at Linux.

Quote
rename the user config files related to Firefox

Now, that's a useful hint.

ajavibp, close firefox and execute:

Code: [Select]
$ mv ~/.mozilla{,_old}
Title: Re: Low speed in Firefox
Post by: dibl on 2020/06/21, 19:44:07
Quote from: axt
More likely an add-on problem.

Yes, good chance.  Find out for sure by reinstalling bare Firefox.   ;D
Title: Re: Low speed in Firefox
Post by: axt on 2020/06/21, 20:00:35
Quote from: dibl
Find out for sure by reinstalling bare Firefox.

Don't take it amiss, but this is nonsense! Re-installing Firefox doesn't help at all.

Add-ons and user configurations are stored in the profile directory. So you rename it (as set forth).
Title: Re: Low speed in Firefox
Post by: eriefisher on 2020/06/21, 20:12:14
Rather than starting fresh I would disable any addons. If you get a desirable result then re-enable one at a time to narrow down. If with all the addons disabled you still have a speed issue then I would rename the ~/.Mozilla directory for a fresh start and test the speed. You haven't enabled an unecessary proxy by chance?
Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/21, 20:17:32
I have removed firefox and moved user folder. I have reinstalled, and nothing, everything the same. I have tried to install firefox-esr (an older version), and nothing changes either.

I am going to test with another PC in which I only have windows, and with a USB-live, to see what happens.The speed difference is brutal, 250 Mbps with firefox and almost 600 Mbps with Chromium.
Thank you very much to everyone for your help.
Title: Re: Low speed in Firefox
Post by: eriefisher on 2020/06/21, 20:43:22
Just for curiosity, using speedtest.net.
firefox:  Installed: 77.0-1     ping-15  down-27.77  up-4.86
google-chrome-stable:  Installed: 83.0.4103.106-1     ping-15  down-27.78  up-4.18
Results: Looks near identical to me. One thing though Chrome doesn't render the website correctly. Oh and these are tested using the same servers.
 
Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/21, 21:04:41
I'm using speedtest.net too (with the same server).On another PC with windows, everything is normal. I have checked the router and I don't see anything strange, QoS is disabled and there are no active priorities or anything like that.wget is fine, I downloaded at 72 MB / s, so it doesn't seem like anything from the system, but rather just from firefox.
Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/22, 12:52:56
This really was not expecting it.
I have started a Xubuntu 18.04 live via USB. Without touching anything just start:
Firefox 72.0.2 -> Download 251 Mbps, Upload 262 Mbps.
Chromium 83 -> Download 603 Mbps, Upload 626 Mbps
After updating Firefox by repositories:
Firefox 77.0.1 -> Download 274 Mbps, Upload 272 Mbps.
Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/22, 12:57:57
Thinking it might be a bug on Firefox I just saw this: https://bugzilla.mozilla.org/show_bug.cgi?id=1636904 (https://bugzilla.mozilla.org/show_bug.cgi?id=1636904)
At least I stay calmer, I was going crazy,
Title: Re: Low speed in Firefox
Post by: dibl on 2020/06/22, 13:00:56
Aha!  Good find -- that is good to know.
Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/22, 13:02:43
You are right.
Thank you very much to everyone for your help.
Title: Re: Low speed in Firefox
Post by: axt on 2020/06/22, 18:51:16
ajavibp, I assumed that you have generally bad rates with Firefox, not only for (synthetic) speed tests and not only for speedtest.net servers (where it can be difficult to find fast test servers for your own fast access).

Well, one good user agent switcher is this one (https://addons.mozilla.org/en-US/firefox/addon/user-agent-switcher-revived/).

Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/22, 19:02:44
I recently noticed a drop in speed, which is why I started using the tests (it was at the request of my company). Not obtaining the contracted speed, I opened an issue, but they did not find any problems on the network. So I started looking and doing checks.
Thank you very much for your recommendation.
Title: Re: Low speed in Firefox
Post by: eriefisher on 2020/06/22, 21:02:56
I just tried this speed test (https://speed.measurementlab.net/#/) to see it there were any differences and got similar results that I posted earlier. Just to eliminate speedtest.net issue.
Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/22, 21:10:14
The problem may appear at high speeds. I have tried several test servers, and always with similar results.
Title: Re: Low speed in Firefox
Post by: piper on 2020/06/24, 17:57:16
All of you's are missing the key point

Delete debians version and use the real firefox and put it in /opt

firefox 79.0a1










Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/24, 18:14:55
Neither.  Despite being a nightly the bug persists.Download 268 Mbps, Upload 262 Mbps.
Title: Re: Low speed in Firefox
Post by: piper on 2020/06/24, 18:23:41
I don't see it, sorry

Thats not saying I disagree that you have a problem, I am just not seeing it on 4 machines


Title: Re: Low speed in Firefox
Post by: ajavibp on 2020/06/24, 18:27:59
Obviously it may be my problem, I don't know. The possibility of a bug seems feasible because it was not me who reported it, so it happens to more people, and the bug talks about an implementation problem. In any case, I will be on the lookout for the bug and continue to test from time to time. Little more can I do, I don't have enough knowledge to take the initiative.
Thank you for your comments
Title: Re: Low speed in Firefox
Post by: piper on 2020/06/24, 18:32:55
No problem, hope you get it solved whether it's on your end or firefox itself