Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Why can't you speed up Firefox 38 and 39?

  • 2 replies
  • 2 have this problem
  • Last reply by cor-el

more options

I have tried all of the troubleshooting tips on the help pages and nothing is speeding up Firefox 39. I have adequate RAM and my graphics drivers are up to date. I have tried disabling hardware acceleration, etc. and nothing has helped.

All Replies (2)

more options

Would you please describe what you mean by slow, including where and how you experience this ? Is this only on video ? Is it still slow with only one tab open ? How does this compare with Internet Explorer ? If a page loads slowly how long about does it take 2 |5|10 seconds, or over a minute ?

Have you seen

Are you noticing high CPU use or High memory use ?

Is this support site slow ? Have you tried temporarily disabling your Firewall AV and any other security software and then tried ? Does that improve things ?

Modified by John99

more options

You can try to create a new profile as a test to check if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.