1505054 - Firefox became slow after update.

Status: RESOLVED DUPLICATE of bug 1495024

(Firefox :: Untriaged, defect)

Description

[jman]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0

Steps to reproduce:

FF is slow after update, slow to load images on websites, slow to press button, etc Here is example:

Let's go to website https://www.marinaratimer.com/
If i press button restart in Chrome it restarts instantly, video:
https://puu.sh/BXiiL/bd017bedb8.mp4 

If i do same in FF there is delay:
https://puu.sh/BXijJ/afce1930a5.mp4
it was never like that before, same for everything.

Here is profile record
https://perfht.ml/2JGHVn0


Actual results:

Delay


Expected results:

No Delay

Comment 1

[Matthias Versen [:Matti]]

I can't reproduce any slowness with Firefox63 and Firefox65 on Windows10.

Can you please attach via the "attach File" link in this report page the output of about:support (or Menü->Help->Troubleshoot information) ?

Can you please also create an additional test profile and look if the new profile makes the problem go away ?
- https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Comment 2

[[:philipp]]

hi, does it make a difference when you set the network settings under the menu ≡ > options > general panel to "no proxy"? (that needs a restart to take effect)
i'm assuming this might be the same issue as bug 1495024

Comment 3

[Tom]

(In reply to [:philipp] from comment #2)
Just gave it a try and indeed Firefox is snappy again.

Comment 4

[[:philipp]]

thanks for checking!

Comment 5

[jman]

[:philipp] suggestion fixed it!

Thank you! FF is back to full speed :)

when proxy auto detect issue will be fixed?

Comment 6

[jman]

you can make issue as closed