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I have to keep refreshing firefox to fix slowness, I'm running vista with norton AV

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I'm running Vista,Norton AV, Adblockplus. I have to refresh firefox quite often to speed things up. How do I find out what is slowing things down?

I'm running Vista,Norton AV, Adblockplus. I have to refresh firefox quite often to speed things up. How do I find out what is slowing things down?

Additional System Details

Installed Plug-ins

  • Adobe PDF Plug-In For Firefox and Netscape 10.1.16
  • Shockwave Flash 28.0 r0
  • 5.1.50906.0
  • NPWLPG
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • iTunes Detector Plug-in

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.0; rv:52.0) Gecko/20100101 Firefox/52.0

More Information

Mkll 314 solutions 1978 answers

Norton is slowing it down.

Norton is slowing it down.
FredMcD
  • Top 10 Contributor
4396 solutions 61650 answers

As a test, disable Norton in your add-ons manager. Note: This will only disable the Norton plugin. Not the main program.


How long between the refresh and the problem returns?

If the problem continues;

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

As a test, disable Norton in your add-ons manager. Note: This will only disable the Norton plugin. Not the main program. ------------------- How long between the refresh and the problem returns? If the problem continues; [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Is the problem still there?