Firefox slow at startup

Hello all, I need help with a problem, I have recently noticed when opening firefox.
Whenever I try to open it without any previous open tab, it takes a long time to start (about 10 seconds). Never had this problem before.
After startup everything works fine and even opening new tabs/windows is done instantly, the problem is known only when firefox is closed and should start.

I tried to disable my antivirus and the problem persists.
I tried to disable hardware acceleration and the problem persists.
I tried from Pentecost firefox a clean, new profile and the problem persists.
I tried to reinstall firefox and the problem persists.
I tried to start firefox in safe mode and seems to work fine, but when I try to run normally while disabling all plug-ins and extensions (default theme) the problem arises again.

No idea what else I could try to fix this annoying?

Try to start the computer in Mode safe mode with network support Windows (on the startup screen, press F8) as a test to see if that helps.

In the Firefox Safe mode, these changes are effective:

  • all extensions are disabled (subject: addons)
  • Default theme is used (no persona)
  • userChrome.css and userContent.css are ignored (chrome folder)
  • default toolbars is used (file: localstore - safe.rdf)
  • JIT JavaScript compilers are disabled (prefs: javascript.options. * jit)
    http://KB.mozillazine.org/about:config
  • hardware acceleration is turned off (Options > Advanced Options > general)
  • plugins are not affected
  • preferences are not affected

Tags: Firefox

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